56. Function Pointer Dispatch Table

#include <stdio.h>

int add(int a, int b) { return a + b; }
int sub(int a, int b) { return a - b; }
int mul(int a, int b) { return a * b; }
int divide(int a, int b) { return a / b; }

int execute_command(int a, int b, int cmd) {
    // Your logic here using function pointer array
    int (*funptr[4])(int, int);
    switch (cmd){
        case 0:
            funptr[cmd] = &add;
            break;
        case 1:
            funptr[cmd] = &sub;
            break;
        case 2:
            funptr[cmd] = &mul;
            break;
        case 3:
            funptr[cmd] = &divide;
            break;    
    }
    return funptr[cmd](a,b);
}

int main() {
    int a, b, cmd;
    scanf("%d %d %d", &a, &b, &cmd);

    int result = execute_command(a, b, cmd);
    printf("%d", result);

    return 0;
}

Solving Approach