Function pointer

#include <stdio.h>
#include <string.h>

static int (*table[256])(int,int);

int add(int upper, int under){return upper + under;}
int sub(int upper, int under){return upper - under;}
int div(int upper, int under){return upper / under;}
int mul(int upper, int under){return upper * under;}

void init()
{
        table['+'] = add;
        table['-'] = sub;
        table['/'] = div;
        table['*'] = mul;
}

int main(int argc, char *argv[]){
       
        int inputA, inputB;
        char operC;

        init();
        scanf("%d %c %d", &inputA, &operC, &inputB);
        printf("%d %c %d = %d", inputA, operC, inputB, table[operC](inputA, inputB));

        return 0;
}