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; }

int execute_command(int a, int b, int cmd) {
    // Your logic here using function pointer array
    int (*func[])(int,int) = {add,sub,mul,divide};
    
    int result = func[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;
}

/*
another approach:
int (*func)(int,int);
    switch (cmd) {
    case 0:
        func = add;
        break;
    case 1:
        func = sub;
        break;
    case 2:
        func = mul;
        break;
    case 3:
        func =  divide;
        break;
    default:
        return 0;
    }



    int result = func(a,b);
    return result;


*/

Solving Approach