For some reason, it prints funny characters ???

This is a discussion on For some reason, it prints funny characters ??? within the C Programming forums, part of the General Programming Boards category; hi, This program prints funny characters which it shouldn't be doin it. And whenever i change something in the program, ...

  1. #1
    Registered User Nutshell's Avatar
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    For some reason, it prints funny characters ???

    hi,

    This program prints funny characters which it shouldn't be doin it. And whenever i change something in the program, the output would change to different set of funny characters. Pls tell me whats wrong with the app. Thnx in advance!

    Code:
    /* Race between the tortoise and the hare */
    
    #include <stdio.h>
    #include <stdlib.h>
    #include <time.h>
    #define SIZE 70
    
    void printPositions( const char positions[], int arraySize );
    int moveAnimals( char positions[], int *currentPos_Tortoise, int *currentPos_Hare );
    
    int main()
    {
       char positions[ SIZE ];
       int whoWins = 0;
       int currentPos_tortoise = 1, currentPos_hare = 1;
    
       printf( "***---Race---***\n\n" );
    
       printf( "BANG!!!\nAND THEY'RE OFF!!!\n\n" );
    
       srand( time( NULL ) );
    
       while ( whoWins == 0 ) {
          whoWins = moveAnimals( positions, &currentPos_tortoise, &currentPos_hare );
          printPositions( positions, SIZE );
       }
    
       switch ( whoWins ) {
          case 1:
             printf( "\n\nTurtle wins!\n" );
             break;
          case 2:
             printf( "\n\nHare wins!\n" );
             break;
          case 3:
             printf( "\n\nIt's a tie.\n" );
             break;
       }
    
       getch();
       return 0;
    }
    
    int moveAnimals( char positions[], int *currentPos_Tortoise, int *currentPos_Hare )
    {
       static int moveTortoise[ 3 ] = { 3, -6, 1 };
       static int moveHare[ 5 ] = { 0, 9, -12, 1, -2 };
       int i;
    
       i = 1 + rand() % 10;
    
       if ( i >= 1 && i <= 5 )
          *currentPos_Tortoise += moveTortoise[ 0 ];
       else if ( i >= 6 && i <= 7 )
          if ( *currentPos_Tortoise != 1 )
             *currentPos_Tortoise += moveTortoise[ 1 ];
       else if ( i >= 8 && i <= 10)
          *currentPos_Tortoise += moveTortoise[ 2 ];
    
       if ( i >= 1 && i <= 2 )
          *currentPos_Hare += moveHare[ 0 ];
       else if ( i >= 3 && i <= 4 )
          *currentPos_Hare += moveHare[ 1 ];
       else if ( i == 5 )
          if ( *currentPos_Hare != 1 )
             *currentPos_Hare += moveHare[ 2 ];
       else if ( i >= 6 && i <= 8 )
          *currentPos_Hare += moveHare[ 3 ];
       else if ( i >= 9 && i <= 10 )
          if ( *currentPos_Hare != 1 )
             *currentPos_Hare += moveHare[ 4 ];
    
             printf( "\nCurrent Pos of tortoise = %d ", *currentPos_Tortoise );
             printf( "Current Pos of hare = %d", *currentPos_Hare );
    
       for ( i = 0; i < 70; i++ )
          positions[ i ] = "-";   /* Clearing up the array */
    
       if ( *currentPos_Tortoise == *currentPos_Hare )
          positions[ *currentPos_Tortoise ] = "!";
       else {
          positions[ *currentPos_Tortoise ] = "T";
          positions[ *currentPos_Hare ] = "H";
       }
    
       if ( *currentPos_Tortoise >= 70 && *currentPos_Hare >= 70 )
          return 3;   /* it's a tie */
       else if ( *currentPos_Tortoise >= 70 )
          return 1;   /* turtle wins */
       else if ( *currentPos_Hare >= 70 )
          return 2;   /* hare wins */
       else
          return 0;   /* nobody wins yet */
    }
    
    void printPositions( const char positions[], int arraySize )
    {
       int i;
    
       printf( "\n\n" );
    
       for ( i = 0; i < arraySize; i++ )
          printf( "%c ", positions[ i ] );
    }

  2. #2
    Registered User
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    I'm not sure.
    Maybe you should comment out some bits of code and try it from the simplest form up, that's the way I debug.

    BTW, don't double post

  3. #3
    Registered User Nutshell's Avatar
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    yeah but they are two different questions.

  4. #4
    Registered User
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    Two questions can fit into the same post (especially if it's about one program :P)

    For instance:
    Why doesn't this work?
    How do I do a comment?

    Code:
    #include <stdio.h>
    
    int main(void
    {
     printf("Hello, world");
     return 0;
    }
    Oh, and a cookie to the first one to spot the reason it doesn't work

  5. #5
    Registered User Nutshell's Avatar
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    yes but i want a title which really describes my problem. Anyway my mistake ok ?

  6. #6
    Registered User
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    Okay.

  7. #7
    Registered User Nutshell's Avatar
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    can u help me out with the thread i've just posted, about the compile warning pls ?

  8. #8
    Mayor of Awesometown Govtcheez's Avatar
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    What do you mean by funny characters? Chars that aren't letters, or just the wrong letters?

    > Oh, and a cookie to the first one to spot the reason it doesn't work

    You didn't close the parens in your main statement.

  9. #9
    ATH0 quzah's Avatar
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    int currentPos_tortoise = 1, currentPos_hare = 1;


    if ( i >= 1 && i <= 5 )
    *currentPos_Tortoise += moveTortoise[ 0 ];
    else if ( i >= 6 && i <= 7 )
    if ( *currentPos_Tortoise != 1 )
    *currentPos_Tortoise += moveTortoise[ 1 ];
    else if ( i >= 8 && i <= 10)
    *currentPos_Tortoise += moveTortoise[ 2 ];

    if ( i >= 1 && i <= 2 )
    *currentPos_Hare += moveHare[ 0 ];
    else if ( i >= 3 && i <= 4 )
    *currentPos_Hare += moveHare[ 1 ];
    else if ( i == 5 )
    if ( *currentPos_Hare != 1 )
    *currentPos_Hare += moveHare[ 2 ];
    else if ( i >= 6 && i <= 8 )
    *currentPos_Hare += moveHare[ 3 ];
    else if ( i >= 9 && i <= 10 )
    if ( *currentPos_Hare != 1 )
    *currentPos_Hare += moveHare[ 4 ];
    You are dereferencing non pointer values.

    'currentPos_Hare' is not a pointer.

    Quzah.
    Last edited by quzah; 01-14-2002 at 04:31 PM.
    Hope is the first step on the road to disappointment.

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