I can not allocate memory in an array - c

Question

#include<stdio.h>
#include<stdlib.h>
int crp(int mtrs[],int size)
{
int a=1;
int i;
for(i=0;i<size;++i)
{
a*=mtrs[i];
}
return a;
}
int main()
{
int k,size;
int **mtrs;
printf("enter the size of the matrix:");
scanf("%d",&size);
mtrs=(int**)malloc(size*sizeof(int*));
if( mtrs == NULL )
printf( "Yetersiz bellek!" );
printf("enter the input numbers of matrix:");
for(k=0;k<size;k++)
{
mtrs[k] =(int*) malloc( size* sizeof(int) );
if( mtrs[k] == NULL )
printf( "not enough memory!" );
}
for(k=0;k<size;k++)
{
scanf("%d",&mtrs[k]);
}
printf("\n\n");
for(k=0;k<size;k++){
printf("%d ",mtrs[k]);
}
printf("\n\n");
printf("Elemanlar carpimi %d dir.",crp(mtrs[k],size));
return 0;
}
I get the problem of access violation reading location 0xFDFDFD.
it stucks at the location of a*=mtrs[i];.. The program's aim is to multiplication of the entered numbers
I am not sure if I am using the malloc in a correct way.

Answer 1

This code snippet is invalid
for(k=0;k<size;k++)
{
scanf("%d",&mtrs[k]);
&&&&&&&&
}
You should write for example
int m;
//...
for(k=0;k<size;k++)
{
for ( m = 0; m < size; m++ )
{
scanf("%d", &mtrs[k][m]);
}
}
The same is valid for this loop
for(k=0;k<size;k++){
printf("%d ",mtrs[k]);
}
It should look like
for(k=0;k<size;k++)
{
for ( m = 0; m < size; m++ )
{
printf("%d ",mtrs[k][m]);
}
printf( "\n" );
}
The function should be defined like
long long int crp( int * mtrs[],int size)
^^^^^^^^^^^^^ ^^^^^^^^^^^^
{
long long int a=1;
int i, j;
^^^^^^^^^
for(i=0;i<size;++i)
{
for ( j = 0; j < size; j++ )
{
a*=mtrs[i];
}
}
return a;
}
And the result of the function should be outputted like
printf("Elemanlar carpimi %lld dir.",crp(mtrs,size));
^^^^^

Answer 2

I do not fully understand what is your code point, but you have various mistakes and logic problems with it.
printf("%d ",mtrs[k]); and scanf("%d",&mtrs[k]); expect int but you passed *int (aka int[]), you probably need to insert/read values using 2 nested for loops.
printf("Elemanlar carpimi %d dir.",crp(mtrs[k],size)); last cycle is for(k=0;k<size;k++), according to it k = size, so mtrs[k] is out of bounds, which cause application crash.