Function Pointer Dispatch Table

Code

#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; }
typedef int (*op_func_t)(int, int);
int execute_command(int a, int b, int cmd) {
    // Your logic here using function pointer array
    op_func_t ops[4];
    if (cmd < 0 || cmd >= (int)(sizeof(ops)/sizeof(ops[0]))) {
        printf("Invalid command index!\n");
        return 0;
    }
    ops[0] = add;
    ops[1] = sub;
    ops[2] = mul;
    ops[3] = divide;

    int result = ops[cmd](a, b);

    return result;
}

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