Pointer to Function

#include <stdio.h>

int sum(int,int);
int size();

int main()
{
int (*p)();
p=sum;
printf("\n ANS = %d",p(10,12));
p=size;
printf("\n ANS = %d",p());
return 0;
}

int sum(int i,int j)
{
return (i+j);
}

int size()
{
return 5;
}