dynamicllyallocated2dmatrix.c

/*this program tells us how to dynamically allocate memory for 2d matrix*/
/*memory allocated by calloc has initial value '0'*/

#include<stdio.h>
#include<malloc.h>
int main()
{   int n=3,i,j;
int *ptr;
    ptr= calloc(n*n, sizeof(int));
    /*to get input from user*/
    for(i=0;i<n;i++)
              {
                 for(j=0;j<n;j++)
                {
                 printf("Enter the value %d:  ",i*n +j+1);
                 scanf("%d",&ptr[i*n + j]);
             }
                // printf("\n");
             }
    /*Now display the dynamically allocated 2d matrix*/
    printf("\nHere is your matrix: \n");
    for(i=0;i<n;i++)
              {
                 for(j=0;j<n;j++)
                 printf("%d ",ptr[i*n + j]);
                 printf("\n");
             }
free(ptr);

return 0;
}//main