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The Big Programming Thread - Page 241

Forum Index > General Forum
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Thread Rules
1. This is not a "do my homework for me" thread. If you have specific questions, ask, but don't post an assignment or homework problem and expect an exact solution.
2. No recruiting for your cockamamie projects (you won't replace facebook with 3 dudes you found on the internet and $20)
3. If you can't articulate why a language is bad, don't start slinging shit about it. Just remember that nothing is worse than making CSS IE6 compatible.
4. Use [code] tags to format code blocks.
SevenShots
Profile Joined November 2011
Germany84 Posts
February 09 2013 17:21 GMT
#4801
On February 10 2013 01:45 CptCutter wrote:
I generally tend to prefer C++ even with its annoying error messages because it gives far more control over the programming. C# is nice too.


That's the thing about C/C++:

The advantage: You have way more control.
The disadvantage: You have way more control.

=)
Savi[wOk]
Profile Blog Joined August 2012
United States81 Posts
February 11 2013 01:14 GMT
#4802
The Dueling Network
Runescape
Games you don't have to download and are able to play on the browser are called
Browser Based games.

Can someone recommend me some things I may need to learn in order to be able to do this?
Lets play starcraft
tofucake
Profile Blog Joined October 2009
Hyrule19228 Posts
February 11 2013 01:27 GMT
#4803
Javascript.
Liquipediaasante sana squash banana
Craton
Profile Blog Joined December 2009
United States17295 Posts
February 11 2013 01:53 GMT
#4804
Pretty much any web technology. Flash is a big player in browser-based games.
twitch.tv/cratonz
Kentor *
Profile Blog Joined December 2007
United States5784 Posts
Last Edited: 2013-02-11 02:14:42
February 11 2013 02:06 GMT
#4805
On February 11 2013 10:14 Savi[wOk] wrote:
The Dueling Network
Runescape
Games you don't have to download and are able to play on the browser are called
Browser Based games.

Can someone recommend me some things I may need to learn in order to be able to do this?

runescape is a java applet

you have to download java to play it.
CptCutter
Profile Joined September 2010
United Kingdom370 Posts
February 11 2013 13:40 GMT
#4806
On February 11 2013 11:06 Kentor wrote:
Show nested quote +
On February 11 2013 10:14 Savi[wOk] wrote:
The Dueling Network
Runescape
Games you don't have to download and are able to play on the browser are called
Browser Based games.

Can someone recommend me some things I may need to learn in order to be able to do this?

runescape is a java applet

you have to download java to play it.


Runescape is actually written with an inhouse version of Java. Jagex will be one of the places i will applying to for internship ^_^
3FFA
Profile Blog Joined February 2010
United States3931 Posts
Last Edited: 2013-02-11 13:56:40
February 11 2013 13:56 GMT
#4807
In the following code: how would I use C to get user input for my string? My teacher said it was awkward and wouldn't teach us it. =/

Note: Code is made to count the number of vowels in a sentence.
+ Show Spoiler +

#include <stdio.h>

int main(int argc, const char * argv[])
{
//declare variables
int a = 0;
int e = 0;
int i = 0;
int o = 0;
int u = 0;

//display string's sentence
char* S1 = "You are cool";
printf("original string is: %s\n", S1);

//count the vowels
for (int v = 0; v < strlen(S1); v++)
{
if (S1[v] == 'a' || S1[v] == 'A')
{
a++;
}

else if (S1[v] == 'e' || S1[v] == 'E')
{
e++;
}

else if (S1[v] == 'i' || S1[v] == 'I')
{
i++;
}

else if (S1[v] == 'o' || S1[v] == 'O')
{
o++;
}

else if (S1[v] == 'u' || S1[v] == 'U')
{
u++;
}
}

//output result
printf("there are %i 'a' vowels \n", a);
printf("there are %i 'e' vowels \n", e);
printf("there are %i 'i' vowels \n", e);
printf("there are %i 'o' vowels \n", o);
printf("there are %i 'u' vowels \n", u);

return 0;
}
"As long as it comes from a pure place and from a honest place, you know, you can write whatever you want."
Tobberoth
Profile Joined August 2010
Sweden6375 Posts
February 11 2013 14:04 GMT
#4808
On February 11 2013 10:27 tofucake wrote:
Javascript.

This. It used to be Flash or Java, but nowadays and especially from here on out, both technologies are becoming obsolete for browser games because they require plugins which leads to security risk... and flash obviously has the problem of being proprietary.

Javascript with HTML5 let's you do pretty sick stuff, especially in modern browsers which use sufficiently fast javascript engines. At the moment it's only really viable for 2D, but there is a standard for 3D in the works as well. A few years from now, you'll probably be hard pressed to find new browser games made in anything other than javascript.
tec27
Profile Blog Joined June 2004
United States3702 Posts
February 11 2013 16:04 GMT
#4809
On February 11 2013 23:04 Tobberoth wrote:
Show nested quote +
On February 11 2013 10:27 tofucake wrote:
Javascript.

This. It used to be Flash or Java, but nowadays and especially from here on out, both technologies are becoming obsolete for browser games because they require plugins which leads to security risk... and flash obviously has the problem of being proprietary.

Javascript with HTML5 let's you do pretty sick stuff, especially in modern browsers which use sufficiently fast javascript engines. At the moment it's only really viable for 2D, but there is a standard for 3D in the works as well. A few years from now, you'll probably be hard pressed to find new browser games made in anything other than javascript.

3D is fairly viable at this point as well. I'm sure gamers have an even lower percentage of IE8 than the world as a whole.

Here's a pretty cool recent project from some of the nodejs guys: http://voxeljs.com/
Can you jam with the console cowboys in cyberspace?
Samsa
Profile Joined April 2009
Germany72 Posts
Last Edited: 2013-02-11 17:06:45
February 11 2013 17:06 GMT
#4810
Hey guys!

I got a C# MVC Web Application running, with a problem (i guess it's a missunderstanding on my side).
There is a View wich lists a List of Items in a beforehand specified Room, including a form with one textbox. In this Textbox you can put a identification wich relates to one item.
So my idea was the following:
you chose a room, an get the list of items in that room. if you input a identification the controller changes the state of the identified item and returns the model back to the same view. (the model is not in the db context, and I only change values directly)
The problem i got:
1. he remembers the input identification even if i set the value of the model to string.Empty
2. only remembers the last state-change (aka on a second input identifier, the first one goes back to his original state and the newly input one changes)

I'm not that familiar with all the c# mvc concepts, so my latest guess is: i need to bind the model to the database context and set the EntityState.Modified. But i do not want the model in the DB, also I only want to save the changes once to the DB.

below are the models (simplified, cause they got some other unrelated properties)
the models in the database context:

public class Room
{
public Guid RoomID { get; set; }
...
public virtual ICollection<Items> Items { get; set; }
}
public class Items
{
public Guid ItemID { get; set; }
...
public Guid RoomID { get; set; }
public virtual Room Room { get; set; }
}
}


and here the models i just use for the views:

public class RoomScan { get; set; }
{
public ItemState ICollection<Items> Items { get; set; }
...
}
public class ItemState
{
public Item Item { get; set; }
public bool Active { get; set; }
}


I hope you understand my problem!
and any help is appreciated
delHospital
Profile Blog Joined December 2010
Poland261 Posts
February 11 2013 18:05 GMT
#4811
On February 11 2013 22:56 3FFA wrote:
In the following code: how would I use C to get user input for my string? My teacher said it was awkward and wouldn't teach us it. =/

Note: Code is made to count the number of vowels in a sentence.
+ Show Spoiler +

#include <stdio.h>

int main(int argc, const char * argv[]
{
//declare variables
int a = 0;
int e = 0;
int i = 0;
int o = 0;
int u = 0;

//display string's sentence
char* S1 = "You are cool";
printf("original string is: %s\n", S1);

//count the vowels
for (int v = 0; v < strlen(S1); v++)
{
if (S1[v] == 'a' || S1[v] == 'A')
{
a++;
}

else if (S1[v] == 'e' || S1[v] == 'E')
{
e++;
}

else if (S1[v] == 'i' || S1[v] == 'I')
{
i++;
}

else if (S1[v] == 'o' || S1[v] == 'O')
{
o++;
}

else if (S1[v] == 'u' || S1[v] == 'U')
{
u++;
}
}

//output result
printf("there are %i 'a' vowels \n", a);
printf("there are %i 'e' vowels \n", e);
printf("there are %i 'i' vowels \n", e);
printf("there are %i 'o' vowels \n", o);
printf("there are %i 'u' vowels \n", u);

return 0;
}

try this (it will read characters until it finds a newline/end-of-file/reaches 99 chars)

char S1[100];
fgets(S1, 100, stdin);
CptCutter
Profile Joined September 2010
United Kingdom370 Posts
February 11 2013 19:34 GMT
#4812
On February 12 2013 03:05 delHospital wrote:
Show nested quote +
On February 11 2013 22:56 3FFA wrote:
In the following code: how would I use C to get user input for my string? My teacher said it was awkward and wouldn't teach us it. =/

Note: Code is made to count the number of vowels in a sentence.
+ Show Spoiler +

#include <stdio.h>

int main(int argc, const char * argv[]
{
//declare variables
int a = 0;
int e = 0;
int i = 0;
int o = 0;
int u = 0;

//display string's sentence
char* S1 = "You are cool";
printf("original string is: %s\n", S1);

//count the vowels
for (int v = 0; v < strlen(S1); v++)
{
if (S1[v] == 'a' || S1[v] == 'A')
{
a++;
}

else if (S1[v] == 'e' || S1[v] == 'E')
{
e++;
}

else if (S1[v] == 'i' || S1[v] == 'I')
{
i++;
}

else if (S1[v] == 'o' || S1[v] == 'O')
{
o++;
}

else if (S1[v] == 'u' || S1[v] == 'U')
{
u++;
}
}

//output result
printf("there are %i 'a' vowels \n", a);
printf("there are %i 'e' vowels \n", e);
printf("there are %i 'i' vowels \n", e);
printf("there are %i 'o' vowels \n", o);
printf("there are %i 'u' vowels \n", u);

return 0;
}

try this (it will read characters until it finds a newline/end-of-file/reaches 99 chars)

char S1[100];
fgets(S1, 100, stdin);

or he could just use cin...
delHospital
Profile Blog Joined December 2010
Poland261 Posts
February 11 2013 19:36 GMT
#4813
On February 12 2013 04:34 CptCutter wrote:
Show nested quote +
On February 12 2013 03:05 delHospital wrote:
On February 11 2013 22:56 3FFA wrote:
In the following code: how would I use C to get user input for my string? My teacher said it was awkward and wouldn't teach us it. =/

Note: Code is made to count the number of vowels in a sentence.
+ Show Spoiler +

#include <stdio.h>

int main(int argc, const char * argv[]
{
//declare variables
int a = 0;
int e = 0;
int i = 0;
int o = 0;
int u = 0;

//display string's sentence
char* S1 = "You are cool";
printf("original string is: %s\n", S1);

//count the vowels
for (int v = 0; v < strlen(S1); v++)
{
if (S1[v] == 'a' || S1[v] == 'A')
{
a++;
}

else if (S1[v] == 'e' || S1[v] == 'E')
{
e++;
}

else if (S1[v] == 'i' || S1[v] == 'I')
{
i++;
}

else if (S1[v] == 'o' || S1[v] == 'O')
{
o++;
}

else if (S1[v] == 'u' || S1[v] == 'U')
{
u++;
}
}

//output result
printf("there are %i 'a' vowels \n", a);
printf("there are %i 'e' vowels \n", e);
printf("there are %i 'i' vowels \n", e);
printf("there are %i 'o' vowels \n", o);
printf("there are %i 'u' vowels \n", u);

return 0;
}

try this (it will read characters until it finds a newline/end-of-file/reaches 99 chars)

char S1[100];
fgets(S1, 100, stdin);

or he could just use cin...

no cin in c
3FFA
Profile Blog Joined February 2010
United States3931 Posts
February 11 2013 19:48 GMT
#4814
What does fgets do? :o
"As long as it comes from a pure place and from a honest place, you know, you can write whatever you want."
WindWolf
Profile Blog Joined July 2012
Sweden11767 Posts
February 11 2013 19:51 GMT
#4815
Just a little question for some more experienced C++ programmers. Do you think it is ok to use typedef to shorten types that gets really long?

In the project I'm working on, I work with std::map<std::string, std::vector<sf::Sound*>>, which I have typedefed as soundMap
EZ4ENCE
delHospital
Profile Blog Joined December 2010
Poland261 Posts
Last Edited: 2013-02-11 20:04:23
February 11 2013 19:59 GMT
#4816
On February 12 2013 04:48 3FFA wrote:
What does fgets do? :o

Reads a line of text from a file.
First argument = where to store the input
Second argument = the maximum number of characters (bytes) to read, most often the size of the buffer given in the first argument
Third argument = file to read from, stdin = standard input, if you're running your program from a terminal, it will be what the user types into it

Also, if you were writing a serious program, it would be a good idea to check the return value. If it's NULL, then either end-of-file was reached or an error occured.
Hitch-22
Profile Blog Joined February 2013
Canada753 Posts
Last Edited: 2013-02-11 23:19:05
February 11 2013 23:07 GMT
#4817
Course.java (this allows the creation of 'courses')
+ Show Spoiler +
abstract public class Course implements Comparable
{	private int credit;
private static String grade;
private String title;

public Course(int c, String g, String t)
{ credit = c;
grade = g;
title = t;
}

/** @param Compares courses based on their total grade points
*/
public int compareTo(Comparable other)
{ int result = 0;

if(getPoints() > ((Course)other).getPoints())
{
result = 1;
}
else if(getPoints() < ((Course)other).getPoints())
{
result = -1;
}

return result;
}

/** @return Retrieves the credit hours.
*/
public int getCreditHrs()
{ return credit;
}

/** @return Retrieves the letter grade.
*/
public String getGrade()
{ return grade;
}

/** @return Retrieves the course title.
*/
public String getTitle()
{ return title;
}

/** @return Determines the total number of grade points earned in this course
*/
public abstract double getPoints();

/** @param Converts a letter grade to the equivalent point value
*/
public static double gradeConvert(String letterGrade)
{ double i = 0;

if(grade.equals("A+"))
{ i = 4.3;
}
else if(grade.equals("A"))
{ i = 4.0;
}
else if(grade.equals("A-"))
{ i = 3.7;
}
else if(grade.equals("B+"))
{ i = 3.3;
}
else if(grade.equals("B"))
{ i = 3.0 ;
}
else if(grade.equals("B-"))
{ i = 2.7 ;
}
else if(grade.equals("C+"))
{ i = 2.3 ;
}
else if(grade.equals("C"))
{ i = 2.0;
}
else if(grade.equals("D"))
{ i = 1.0;
}
else if(grade.equals("F"))
{ i = 0.0;
}
else if(grade.equals("WF"))
{ i = 0.0;
}

return i;

}

/** @return Creates and returns a textual string containing the course title, letter grade, and total grade points earned.
*/
public String toString()
{ String result = "";

result = getTitle() + " " + getGrade() + " " + "points " + getPoints();


return result;

}


}


Student.java (This creates a 'student')
+ Show Spoiler +

public class Student
{ private String firstName;
private String lastName;

// Companion Variable
private int arrCouCompanion;
Course arrayCourses[] = new Course[15];

public Student(String firstNameIn, String lastNameIn)
{ firstName = firstNameIn;
lastName = lastNameIn;
arrCouCompanion = 0;
}

public void addCourse(String titleInput,
int creditInput,
String letterGradeInput,
int courseTypeInput)
{ if(courseTypeInput == 1)
{ arrayCourses[arrCouCompanion] = new CSInfoCore(creditInput,
letterGradeInput,
titleInput);
arrCouCompanion++;
}
else if(courseTypeInput == 2)
{ arrayCourses[arrCouCompanion] = new MathCore(creditInput,
letterGradeInput,
titleInput);
arrCouCompanion++;
}
else if(courseTypeInput == 3)
{ arrayCourses[arrCouCompanion] = new Breadth(creditInput,
letterGradeInput,
titleInput);

arrCouCompanion++;
}
else if(courseTypeInput == 4)
{ arrayCourses[arrCouCompanion] = new Electives(creditInput,
letterGradeInput,
titleInput);
arrCouCompanion++;
}
else
{ System.out.println("Please re-enter a valid input");
}

}

public void reOrder();
{ int min;
Course temp;

for (int index = 0; index < arrayCourses.length-1; index++)
{ min = index;
for (int scan = index+1; scan < arrCouCompanion; scan++)
{ if (arrayCourses[scan].compareTo(arrayCourses[min]) < 0)
{min = scan;

// Swap the values
temp = arrayCourses[min];
arrayCourses[min] = arrayCourses[index];
arrayCourses[index] = temp;
}
}
}
}

public String searchCourse(String tookCourse )
{ String result = "Course ";
int i = 0;
boolean isTrue = false;

for (i = 0;i < arrayCourses.length-1 && !isTrue;i++)
{ if(tookCourse.equals(arrayCourses[i].getTitle()))
{ isTrue = true;
}
}

if(isTrue)
{ result += arrayCourses[i];
}
else
{ result += tookCourse + " not found";
}

return result;
}

public String toString()
{ String result = "";
result = firstName + " " + lastName + "\n"
+ "Courses:\n\t";
for(int i = 0;i < arrayCourses.length-1;i++)
{ result += arrayCourses[i] + "\n";
}
return result;
}

}


CourseDriver.java (This is the testing class)
+ Show Spoiler +


import java.util.Scanner;

public class CourseDriver
{ public static void main(String[] args)
{ Scanner scan = new Scanner(System.in);
String firstName = scan.next();
String lastName = scan.next();

Student student = new Student(firstName, lastName);
String titleIn = scan.next();

while(!titleIn.equals("end"))
{ int creditIn = scan.nextInt();
String grade = scan.next();
int courseTypeInputIn = scan.nextInt();
student.addCourse(titleIn, creditIn, grade, courseTypeInputIn);
titleIn = scan.next();
}
System.out.println("this shit be un-sorted " + student);

student.reOrder();
System.out.println("This shit be sorted nigga " + student);

titleIn = scan.next();

while(!titleIn.equals("end"))
{ System.out.println(student.searchCourse(titleIn));
titleIn = scan.next();
}

}
}[code][/spoiler]

CSInfoCore.java (This allows the overriding of abstract class getPoints())
[spoiler]
[code]
public abstract class CSInfoCore extends Course
{ public CSInfoCore(int c, String g, String t)
{ super(c,g,t);
}

public double getPoints()
{ double grade = getCreditHrs()*gradeConvert("grade");
return grade;
}
}


MathCore.java (This allows the overriding of abstract class getPoints())
+ Show Spoiler +


public abstract class MathCore extends Course
{ public MathCore(int c, String g, String t)
{ super(c,g,t);
}

public double getPoints()
{ double grade = 1.5*getCreditHrs()*gradeConvert("grade");
return grade;
}
}


Breadth.java (This allows the overriding of abstract class getPoints())
+ Show Spoiler +


public abstract class Breadth extends Course
{ public Breadth(int c, String g, String t)
{ super(c,g,t);
}

public double getPoints()
{ double grade = 1.2*getCreditHrs()*gradeConvert("grade");
return grade;
}
}


Electives.java (This allows the overriding of abstract class getPoints())
+ Show Spoiler +


public abstract class Electives extends Course
{ public Electives(int c, String g, String t)
{ super(c,g,t);
}

public double getPoints()
{ double grade = 0.9*getCreditHrs()*gradeConvert("grade");
return grade;
}
}


My error is this:

error: CSInfoCore is abstract; cannot be instantiated
arrayCourses[arrCouCompanion] = new CSInfoCore(creditInput, ...)

This follows for the next 4 instantiated sections (one after another).

I can't remove the abstraction, however, because then I get the error (Speaking of classes CSInfoCore through Electives) that you can't edit an abstract method without an abstract class.

THANKS! (This is due tonight, put a lot of time in it, if anyone can put in some good ideas or see where I screwed up that'd be great!)
"We all let our sword do the talking for us once in awhile I guess" - Bregor, the legendary critical striker and critical misser who triple crits 2 horses with 1 arrow but lands 3 1's in a row
CecilSunkure
Profile Blog Joined May 2010
United States2829 Posts
February 11 2013 23:44 GMT
#4818
On February 12 2013 04:51 WindWolf wrote:
Just a little question for some more experienced C++ programmers. Do you think it is ok to use typedef to shorten types that gets really long?

In the project I'm working on, I work with std::map<std::string, std::vector<sf::Sound*>>, which I have typedefed as soundMap

Yes. Usually typedefs like this go inside of a class definition so you can do: SoundManager::soundMap.
delHospital
Profile Blog Joined December 2010
Poland261 Posts
Last Edited: 2013-02-12 01:15:27
February 12 2013 01:10 GMT
#4819
On February 12 2013 08:07 Hitch-22 wrote:
Course.java (this allows the creation of 'courses')
+ Show Spoiler +
abstract public class Course implements Comparable
{	private int credit;
private static String grade;
private String title;

public Course(int c, String g, String t)
{ credit = c;
grade = g;
title = t;
}

/** @param Compares courses based on their total grade points
*/
public int compareTo(Comparable other)
{ int result = 0;

if(getPoints() > ((Course)other).getPoints())
{
result = 1;
}
else if(getPoints() < ((Course)other).getPoints())
{
result = -1;
}

return result;
}

/** @return Retrieves the credit hours.
*/
public int getCreditHrs()
{ return credit;
}

/** @return Retrieves the letter grade.
*/
public String getGrade()
{ return grade;
}

/** @return Retrieves the course title.
*/
public String getTitle()
{ return title;
}

/** @return Determines the total number of grade points earned in this course
*/
public abstract double getPoints();

/** @param Converts a letter grade to the equivalent point value
*/
public static double gradeConvert(String letterGrade)
{ double i = 0;

if(grade.equals("A+"))
{ i = 4.3;
}
else if(grade.equals("A"))
{ i = 4.0;
}
else if(grade.equals("A-"))
{ i = 3.7;
}
else if(grade.equals("B+"))
{ i = 3.3;
}
else if(grade.equals("B"))
{ i = 3.0 ;
}
else if(grade.equals("B-"))
{ i = 2.7 ;
}
else if(grade.equals("C+"))
{ i = 2.3 ;
}
else if(grade.equals("C"))
{ i = 2.0;
}
else if(grade.equals("D"))
{ i = 1.0;
}
else if(grade.equals("F"))
{ i = 0.0;
}
else if(grade.equals("WF"))
{ i = 0.0;
}

return i;

}

/** @return Creates and returns a textual string containing the course title, letter grade, and total grade points earned.
*/
public String toString()
{ String result = "";

result = getTitle() + " " + getGrade() + " " + "points " + getPoints();


return result;

}


}


Student.java (This creates a 'student')
+ Show Spoiler +

public class Student
{ private String firstName;
private String lastName;

// Companion Variable
private int arrCouCompanion;
Course arrayCourses[] = new Course[15];

public Student(String firstNameIn, String lastNameIn)
{ firstName = firstNameIn;
lastName = lastNameIn;
arrCouCompanion = 0;
}

public void addCourse(String titleInput,
int creditInput,
String letterGradeInput,
int courseTypeInput)
{ if(courseTypeInput == 1)
{ arrayCourses[arrCouCompanion] = new CSInfoCore(creditInput,
letterGradeInput,
titleInput);
arrCouCompanion++;
}
else if(courseTypeInput == 2)
{ arrayCourses[arrCouCompanion] = new MathCore(creditInput,
letterGradeInput,
titleInput);
arrCouCompanion++;
}
else if(courseTypeInput == 3)
{ arrayCourses[arrCouCompanion] = new Breadth(creditInput,
letterGradeInput,
titleInput);

arrCouCompanion++;
}
else if(courseTypeInput == 4)
{ arrayCourses[arrCouCompanion] = new Electives(creditInput,
letterGradeInput,
titleInput);
arrCouCompanion++;
}
else
{ System.out.println("Please re-enter a valid input");
}

}

public void reOrder();
{ int min;
Course temp;

for (int index = 0; index < arrayCourses.length-1; index++)
{ min = index;
for (int scan = index+1; scan < arrCouCompanion; scan++)
{ if (arrayCourses[scan].compareTo(arrayCourses[min] < 0)
{min = scan;

// Swap the values
temp = arrayCourses[min];
arrayCourses[min] = arrayCourses[index];
arrayCourses[index] = temp;
}
}
}
}

public String searchCourse(String tookCourse )
{ String result = "Course ";
int i = 0;
boolean isTrue = false;

for (i = 0;i < arrayCourses.length-1 && !isTrue;i++)
{ if(tookCourse.equals(arrayCourses[i].getTitle()))
{ isTrue = true;
}
}

if(isTrue)
{ result += arrayCourses[i];
}
else
{ result += tookCourse + " not found";
}

return result;
}

public String toString()
{ String result = "";
result = firstName + " " + lastName + "\n"
+ "Courses:\n\t";
for(int i = 0;i < arrayCourses.length-1;i++)
{ result += arrayCourses[i] + "\n";
}
return result;
}

}


CourseDriver.java (This is the testing class)
+ Show Spoiler +


import java.util.Scanner;

public class CourseDriver
{ public static void main(String[] args)
{ Scanner scan = new Scanner(System.in);
String firstName = scan.next();
String lastName = scan.next();

Student student = new Student(firstName, lastName);
String titleIn = scan.next();

while(!titleIn.equals("end"))
{ int creditIn = scan.nextInt();
String grade = scan.next();
int courseTypeInputIn = scan.nextInt();
student.addCourse(titleIn, creditIn, grade, courseTypeInputIn);
titleIn = scan.next();
}
System.out.println("this shit be un-sorted " + student);

student.reOrder();
System.out.println("This shit be sorted nigga " + student);

titleIn = scan.next();

while(!titleIn.equals("end"))
{ System.out.println(student.searchCourse(titleIn));
titleIn = scan.next();
}

}
}[code][/spoiler]

CSInfoCore.java (This allows the overriding of abstract class getPoints())
[spoiler]
[code]
public abstract class CSInfoCore extends Course
{ public CSInfoCore(int c, String g, String t)
{ super(c,g,t);
}

public double getPoints()
{ double grade = getCreditHrs()*gradeConvert("grade");
return grade;
}
}


MathCore.java (This allows the overriding of abstract class getPoints())
+ Show Spoiler +


public abstract class MathCore extends Course
{ public MathCore(int c, String g, String t)
{ super(c,g,t);
}

public double getPoints()
{ double grade = 1.5*getCreditHrs()*gradeConvert("grade");
return grade;
}
}


Breadth.java (This allows the overriding of abstract class getPoints())
+ Show Spoiler +


public abstract class Breadth extends Course
{ public Breadth(int c, String g, String t)
{ super(c,g,t);
}

public double getPoints()
{ double grade = 1.2*getCreditHrs()*gradeConvert("grade");
return grade;
}
}


Electives.java (This allows the overriding of abstract class getPoints())
+ Show Spoiler +


public abstract class Electives extends Course
{ public Electives(int c, String g, String t)
{ super(c,g,t);
}

public double getPoints()
{ double grade = 0.9*getCreditHrs()*gradeConvert("grade");
return grade;
}
}


My error is this:

error: CSInfoCore is abstract; cannot be instantiated
arrayCourses[arrCouCompanion] = new CSInfoCore(creditInput, ...)

This follows for the next 4 instantiated sections (one after another).

I can't remove the abstraction, however, because then I get the error (Speaking of classes CSInfoCore through Electives) that you can't edit an abstract method without an abstract class.

THANKS! (This is due tonight, put a lot of time in it, if anyone can put in some good ideas or see where I screwed up that'd be great!)

I'm not a Java guru, but it should work if you keep Core abstract and make all other classes non-abstract. There's something wrong with compareTo(), too... casting to Course like that is bad OOP. Also, when asking for help on a forum, try posting a minimal (but complete) amount of code that still doesn't work as you would expect instead of dumping contents of 10 files.

E: sorry, this compareTo thing is fine, I think... I'm just bad with Java
Shield
Profile Blog Joined August 2009
Bulgaria4824 Posts
Last Edited: 2013-02-12 01:20:35
February 12 2013 01:19 GMT
#4820
So I have this little problem to solve:

You are in charge of recording marks for a group of students. Input a list of marks. Input ends with 0 (0 itself is not someone's mark). Output the number of students who scored 1) greater than or equal to 85; 2) between 60 and 84; 3) strictly less than 60.


Sample Input
88 71 68 70 59 81 91 42 66 77 83 0


I just need a hint how to get input like this in C. Also, how should I go about storing marks? Is this a dynamic memory (heap) matter? I already know about getchar and scanf, but are they enough? Maybe getchar() and putchar()?

Please don't bother to give me the solution. I just need a little help.

Thanks.
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