warning: passing arg 1 of `printArray' from incompatible pointer type

[yougene]

When I try to compile my code I get this message

fig06_21.c: In function `main':
fig06_21.c:12: warning: passing arg 1 of `printArray' from incompatible pointer type
fig06_21.c:15: warning: passing arg 1 of `printArray' from incompatible pointer type
fig06_21.c:18: warning: passing arg 1 of `printArray' from incompatible pointer type

I copied the example straight from the book I have no idea what the problem is. I imagine it has something to do with the arrays.

#include <stdio.h>

void printArray( const int[][ 3 ] );

int main()
{
   int array1[ 2 ][ 3 ] = { { 1, 2, 3 }, { 4, 5, 6 } },
       array2[ 2 ][ 3 ] = { 1, 2, 3, 4, 5 },
       array3[ 2 ][ 3 ] = { { 1, 2}, { 4 } };

   printf("Values in array1 by row are:\n");
   printArray( array1 ); 

   printf("Values in array2 by row are:\n");
   printArray( array2 );

   printf("Values in array3 by row are:\n" );
   printArray( array3 );

   return 0;
}



void printArray( const int a[][ 3 ] )
{
   int i, j;

   for (i = 0; i <= 1; i++ ) {
      for (j = 0; j <= 2; j++)
         printf("%d ", a[ i ][ j ] );

   printf("\n");
   }
}

[ssharish2005]

#include <stdio.h>

void printArray(const int [][3] );

int main()
{
   const int array1[ 2 ][ 3 ] = { { 1, 2, 3 }, { 4, 5, 6 } };
   const int array2[ 2 ][ 3 ] = { { 7, 8, 9 }, { 10, 11, 12 } };
   const int array3[ 2 ][ 3 ] = { { 13, 14, 15 }, { 16, 17, 18 } };

   printf("Values in array1 by row are:\n");
   printArray( array1 ); 

   printf("Values in array2 by row are:\n");
   printArray( array2 );

   printf("Values in array3 by row are:\n" );
   printArray( array3 );

   getchar();
   return 0;
}



void printArray(const int a[][3] )
{
   int i, j;

   for (i = 0; i <= 1; i++ ) {
      for (j = 0; j <= 2; j++)
         printf("&#37;d ", a[ i ][ j ] );

   printf("\n");
   }
}

/* my outout
Values in array1 by row are:
1 2 3
4 5 6
Values in array2 by row are:
7 8 9
10 11 12
Values in array3 by row are:
13 14 15
16 17 18

*/

ssharish2005

[yougene]

I haven't tried running this yet(compiler on different computer) but what did you change exactly?

All I see is that you added more numbers into one of the arrays, and added getchar to the end.

[ssharish2005]

Well you never mentioned datetype of the array, since there was type conversion conflict that is from int to const int, i changed everything to const int.

The main problem was to declare the datatype for your array, which you dint do.

int array1[ 2 ][ 3 ] = { { 1, 2, 3 }, { 4, 5, 6 } };
int array2[ 2 ][ 3 ] = { 1, 2, 3, 4, 5 };
int array3[ 2 ][ 3 ] = { { 1, 2}, { 4 } };

ssharish2005

[yougene]

ahh, thank you

[yougene]

Your code worked, but I don't see why mine didn't. In a previous exercise I had no problem passing a normal array as a constant input. What's the difference between what I posted earlier and this?

#include <stdio.h>
#define SIZE 99

void mean( const int [] );
void median( int [] );
void mode( int [], const int [] ) ;
void bubbleSort( int [] );
void printArray( const int[] );


int main()
{
   int frequency[ 10 ] = { 0 };
   int response[ SIZE ] =
      { 6, 7, 8, 9, 8, 7, 8, 9, 8, 9,
        7, 8, 9, 5, 9, 8, 7, 8, 7, 8,
        6, 7, 8, 9, 3, 9, 8, 7, 8, 7,
        7, 8, 9, 8, 9, 8, 9, 7, 8, 9,
        6, 7, 8, 7, 8, 7, 9, 8, 9, 2,
        7, 8, 9, 8, 9, 8, 9, 7, 5, 3,
        5, 6, 7, 2, 5, 3, 9, 4, 6, 4,
        7, 8, 9, 6, 8, 7, 8, 9, 7, 8,
        7, 4, 4, 2, 5, 3, 8, 7, 5, 6,
        4, 5, 6, 1, 6, 5, 7, 8, 7 };

   mean( response );
   mode( frequency, response );

   return 0;
}


void mean( const int answer[] )
{
   int j, total = 0;

   printf("&#37;s\n%s\n%s\n", "********", "  Mean", "********" );

   for (j = 0; j <= SIZE - 1; j++ )
      total += answer[ j ];

   printf( "The mean is the average value of the data\n"
           "items.  The mean is equal to the total of\n"
           "all the data items divided by the number\n"
           "of data items ( %d ).  The mean value for\n"
           "this run is: %d / %d = %.4f\n\n",
           SIZE, total, SIZE, ( double ) total / SIZE );
}



void mode( int freq[], const int answer[] )
{
   int rating, j, h, largest = 0, modeValue = 0;

   printf("\n%s\n%s\n%s\n",
          "*********", "   Mode", "*********" );

   for ( rating = 1; rating <= 0; rating++ )
      freq[ rating ] = 0;

   for ( j = 0; j <= SIZE - 1; j++ )
      ++freq [ answer[ j ] ];

   printf("%s%11s%19s\n\n%54s\n%54s\n\n",
          "Response", "Frequency", "Histogram",
          "1    1     2    2", "5    0    5    0    5");

   for ( rating = 1; rating <= 9; rating++ ) {
      printf("%8d%11d          ", rating, freq[ rating ] );

      if ( freq[ rating ] > largest ) {
         largest = freq[ rating ];
         modeValue = rating;
      }

      for ( h = 1; h <= freq[ rating ]; h++ )
         printf("*");

      printf("\n");
   }

   printf("The mode is the most frequent value.\n"
          "For this run the mode is %d which occured"
          " %d ties.\n", modeValue, largest );
}