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Sep 8th, 2009
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how do you convert this into c

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this is a java code, i need to convert it into C.

  1. private void addFrame (int toAdd) {
  2. int[ ] frameScores = new int[0];
  3. totalScore = totalScore + toAdd;
  4. if (frameScores.length < lastFrameNumber) {
  5. int [ ] temp = new int [frameScores.length+1];
  6. for (int k=0; k<frameScores.length; k++) {
  7. temp[k] = frameScores[k];
  8. }
  9. temp[frameScores.length] = totalScore;
  10. frameScores = temp;
  11. }
  12. }

im having problem with

frameScores = temp

it is throwing a incompatible types errors

here is my C code
  1. void addFrame(int toAdd)
  2. 	{
  3.          totalScore = totalScore + toAdd;
  4.          if (sizeof(frameScores) < lastFrameNumber) {
  5.             int temp[sizeof(frameScores)+1];
  6.             for (int k=0; k<sizeof(frameScores); k++) 
  7.             {
  8.                 temp[k] = frameScores[k];
  9.             }
  10.             temp[sizeof(frameScores)] = totalScore;
  11.             frameScores = temp;
  12.             }     
  13.     }
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Re: how do you convert this into c

Java is derived from C. You can use dynamic memory allocation.
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Re: how do you convert this into c

How is frameScores declared?
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Re: how do you convert this into c

Click to Expand / Collapse  Quote originally posted by Ancient Dragon ...
How is frameScores declared?
it is declared as an integer array. Same as temp.
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Re: how do you convert this into c

>>int temp[sizeof(frameScores)+1];
That line is wrong. If frameScores is declared as int frameScores[5] then the above declaration will create an array of 5*sizeof(int) = 20+1 elements. What you want is 6 elements, so the line should be int temp[sizeof((frameScores)/sizeof(frameScores[0]))+1];

Well that will correct that line, but it still will not correct the line frameScores = temp; because the two arrays are not the same size.
Last edited by Ancient Dragon; Sep 8th, 2009 at 10:31 pm.
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Re: how do you convert this into c

Click to Expand / Collapse  Quote originally posted by Ancient Dragon ...
>>int temp[sizeof(frameScores)+1];
That line is wrong. If frameScores is declared as int frameScores[5] then the above declaration will create an array of 5*sizeof(int) = 20+1 elements. What you want is 6 elements, so the line should be int temp[sizeof((frameScores)/sizeof(frameScores[0]))+1];

Well that will correct that line, but it still will not correct the line frameScores = temp; because the two arrays are not the same size.
thank you. any suggestion on how i could correct it?
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Re: how do you convert this into c

If you are attempting to add a new element to frameScores array, such as increase its size from 5 to 6 elements, then make frameScores a pointer and reallocate its size.
  1. int* frameScores= {0};
  2. int frameSize = 0; // size of frameScores
  3. int totalScore = 0;
  4. int lastFrameNumber = 0;
  5.  
  6. void addFrame(int toAdd)
  7. {
  8.          totalScore = totalScore + toAdd;
  9.          if (frameSize < lastFrameNumber) 
  10.          {
  11.             frameScores = (int *)realloc(frameScores,(frameSize+1) * sizeof(int));
  12.             frameScores[frameSize] = totalScore;
  13.             ++frameSize;
  14.          }     
  15. }
  16.  
  17. int main()
  18. {
  19. }
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Re: how do you convert this into c

Click to Expand / Collapse  Quote originally posted by Ancient Dragon ...
If you are attempting to add a new element to frameScores array, such as increase its size from 5 to 6 elements, then make frameScores a pointer and reallocate its size.
  1. int* frameScores= {0};
  2. int frameSize = 0; // size of frameScores
  3. int totalScore = 0;
  4. int lastFrameNumber = 0;
  5.  
  6. void addFrame(int toAdd)
  7. {
  8.          totalScore = totalScore + toAdd;
  9.          if (frameSize < lastFrameNumber) 
  10.          {
  11.             frameScores = (int *)realloc(frameScores,(frameSize+1) * sizeof(int));
  12.             frameScores[frameSize] = totalScore;
  13.             ++frameSize;
  14.          }     
  15. }
  16.  
  17. int main()
  18. {
  19. }
this is what i was trying to convert, the last page where the java code is

http://www.cs.berkeley.edu/~clancy/w...es/bowling.pdf

the framescore was declared as private with and it size is int[0]. I am new to java, and so far i was able to convert probably around 85% of the code, i was stuck with this part wherein the array from temp is being transfered into framescores.

and if you might find it interesting, here's my C code

  1. #include<stdio.h>
  2. #include<conio.h>
  3. #include<string.h>
  4.  
  5. const int ROLLING_FIRST_BALL = 0;
  6. const int ROLLING_SECOND_BALL =1;
  7. const int STRIKE_LAST_BALL =2;
  8. const int TWO_CONSEC_STRIKE =3;
  9. const int STRIKE_2_BALLS_AGO =4;
  10. const int SPARE_LAST_BALL =5;
  11.  
  12. class Scorer{
  13. 	private:
  14. 	int rollingFrame;
  15. 	int totalScore;
  16. 	int frameScores[];
  17. 	int state;
  18. 	int firstBallInFrame;
  19. 	int lastFrameNumber;
  20. 	void addFrame(int toAdd)
  21. 	{
  22.          totalScore = totalScore + toAdd;
  23.          if (sizeof(frameScores) < lastFrameNumber) {
  24.             int temp[sizeof(frameScores)+1];
  25.             for (int k=0; k<sizeof(frameScores); k++) 
  26.             {
  27.                 temp[k] = frameScores[k];
  28.             }
  29.             temp[sizeof(frameScores)] = totalScore;
  30.             frameScores = temp;
  31.             }     
  32.     }
  33. 	public:     
  34. 	Scorer(int frameCount){
  35.                lastFrameNumber = frameCount;
  36.                rollingFrame = 1;
  37. 	           totalScore = 0;
  38.            	   frameScores[0];
  39.    	           state = ROLLING_FIRST_BALL;
  40.     }
  41. 	int frameNumber( )
  42.     {
  43.         if (sizeof(frameScores) == lastFrameNumber) {
  44.                return lastFrameNumber+1;// game is over
  45.         } else if (rollingFrame > lastFrameNumber) {
  46.                return lastFrameNumber;// we're in last frame
  47.         } else {
  48.                return rollingFrame;
  49.         }
  50.     }
  51. 	int scoreSoFar(){
  52.         if(sizeof(frameScores) == lastFrameNumber)
  53.             return frameScores[lastFrameNumber-1];
  54. 	    else
  55. 		    return totalScore;
  56.     }
  57.     bool gameIsOver(){
  58.          return frameNumber() > lastFrameNumber;
  59.     }
  60.     int *roll (int ball)
  61.     {
  62.         if(state == ROLLING_FIRST_BALL)
  63.         {
  64.                  if(ball == 10)
  65.                  {
  66.                        rollingFrame++;
  67.                        state = STRIKE_LAST_BALL;
  68.                  }else 
  69.                  {
  70.                        firstBallInFrame = ball;
  71.                        state=ROLLING_SECOND_BALL;
  72.                  }
  73.         }else if(state == ROLLING_SECOND_BALL)
  74.         {
  75.               if(firstBallInFrame + ball == 10)
  76.               {
  77.                  rollingFrame++;
  78.                  state = SPARE_LAST_BALL;
  79.               }else
  80.               {
  81.                    rollingFrame++;
  82.                    addFrame(firstBallInFrame + ball);
  83.                    state = ROLLING_FIRST_BALL;
  84.               }
  85.         }else if(state==SPARE_LAST_BALL)
  86.         {
  87.               addFrame(10 + ball);
  88.               if(ball == 10) 
  89.               {
  90.                       rollingFrame++;
  91.                       state = STRIKE_LAST_BALL;
  92.               }else 
  93.               {
  94.                     firstBallInFrame = ball;
  95.                     state = ROLLING_SECOND_BALL;
  96.               }
  97.         }else if(state == STRIKE_LAST_BALL)
  98.         {
  99.               if(ball==10)
  100.               {
  101.                      rollingFrame++;
  102.                      state = TWO_CONSEC_STRIKE;
  103.               }else
  104.               {
  105.                       firstBallInFrame = ball;
  106.                       state = STRIKE_2_BALLS_AGO;
  107.               }
  108.         }
  109.         else if(state == TWO_CONSEC_STRIKE)
  110.         {
  111.                addFrame(20 + ball);
  112.                if(ball == 10)
  113.                {
  114.                        rollingFrame++;             
  115.                }else
  116.                {
  117.                        firstBallInFrame = ball;
  118.                        state = STRIKE_2_BALLS_AGO;
  119.                }
  120.         }
  121.         else if(state == STRIKE_2_BALLS_AGO)
  122.         {
  123.                 addFrame(10 + firstBallInFrame + ball);
  124.                 if(firstBallInFrame + ball == 10)
  125.                 {
  126.                          rollingFrame++;
  127.                          state=SPARE_LAST_BALL;
  128.                 }else
  129.                 {
  130.                          totalScore = totalScore + firstBallInFrame + ball;
  131.                          rollingFrame++;
  132.                          addFrame(firstBallInFrame + ball);
  133.                          state = ROLLING_FIRST_BALL;
  134.                 }
  135.         }else
  136.         {
  137.          //invalid state: state
  138.         }
  139.     return frameScores;
  140. }
  141. };
Last edited by ivatanako; Sep 8th, 2009 at 10:55 pm. Reason: added my c code
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