Thread: passing argument of incompatible pointer type- warning in the function call in main

Code:

Code:

#include <stdio.h>
#include <stdlib.h>




    int size_b_row1;
    int size_b_col1;


int main(void) {


     double C[4][4] = {{1,3,5,2},{7,6,2,2},{1,2,7,3},{2,3,5,3}};
     double TC[4][4];


    transpose(C, TC);


    puts("Hello World"); /* prints Hello World */
    return EXIT_SUCCESS;
}




  void transpose(double** matrix_t, double** matrix)
    {


    int i,j;


    /* allocate memory for matrix */


    matrix_t=(double **) malloc(sizeof(double *)*size_b_row1);
    for( i=0;i<size_b_row1;i++)
    {
        matrix_t[i]=(double *) malloc(sizeof(double*)*size_b_col1);
    }


    matrix=(double **) malloc(sizeof(double *)*size_b_row1);
    for( i=0;i<size_b_row1;i++)
    {
        matrix[i]=(double *) malloc(sizeof(double*)*size_b_col1);
    }


    //output matrix


    for(i=0;i<size_b_col1;i++)
    {
    for(j=0;j<size_b_row1;j++)
    {
        matrix_t[j][i]= matrix[i][j];
    }


    }


    //free memory
    for(i=0;i<size_b_row1;i++)
    {
    free(matrix[i]);
    }
    free(matrix);




    for(i=0;i<size_b_row1;i++)
    {
    free(matrix_t[i]);
    }
    free(matrix_t);
    } // end of main body

You also shouldn't be trying to use malloc on pointers to statically allocated arrays. Memory has already been allocated for those pointers.

Jim