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#include <stdio.h>
int sum(int a, int b);
int subtract(int a, int b);
int mul(int a, int b);
int div(int a, int b);
/* initialize the pointer array */
int (*p[4]) (int x, int y) = {
sum, subtract, mul, div
} ;
int main(void)
{
int result;
int i = 2, j = 2, op;
printf("0: Add, 1: Subtract, 2: Multiply, 3: Divide\n");
do {
printf("Enter number of operation: ");
scanf("%d", &op);
} while(op<0 || op>3);
result = (*p[op]) (i, j);
printf("%d", result);
return 0;
}
int sum(int a, int b)
{
return a + b;
}
int subtract(int a, int b)
{
return a - b;
}
int mul(int a, int b)
{
return a * b;
}
int div(int a, int b)
{
if(b)
return a / b;
else
return 0;
}
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