GATE | GATE-CS-2017 (Set 1) | Question 27

Consider the following C code:

#include <stdio.h>

int * assignval (int *x, int val)
{
    *x = val;
    return x;
}

int main()
{
    int *x = malloc(sizeof(int));
    if (NULL == x) return;
    x = assignval(x, 0);
    if(x)
    {
        x = (int*) malloc(sizeof (int));
        if (NULL == x) return;
        x = assignval (x, 10);
    }
    printf("%d\\n", *x);
    free(x);
}

The code suffers from which one of the following problems:

(A)

compiler error as the return of malloc is not typecast appropriately.

(B)

compiler error because the comparison should be made as x==NULL and not as shown.

(C)

compiles successfully but execution may result in dangling pointer.

(D)

compiles successfully but execution may result in memory leak.

Answer

Please comment below if you find anything wrong in the above post
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