#include <stdio.h>

// Function for addition
int add(int a, int b) {
    return a + b;
}

// Function for subtraction
int subtract(int a, int b) {
    return a - b;
}

// Function for multiplication
int multiply(int a, int b) {
    return a * b;
}

// Function for division
float divide(int a, int b) {
    return (float)a / b;
}

int main() {
    int choice, a, b;
    float result;

    printf("1. Addition\n");
    printf("2. Subtraction\n");
    printf("3. Multiplication\n");
    printf("4. Division\n");
    printf("Enter your choice: ");
    scanf("%d", &choice);

    printf("Enter two numbers: ");
    scanf("%d%d", &a, &b);

    switch(choice) {
        case 1:
            result = add(a, b);
            printf("Result: %d\n", result);
            break;
        case 2:
            result = subtract(a, b);
            printf("Result: %d\n", result);
            break;
        case 3:
            result = multiply(a, b);
            printf("Result: %d\n", result);
            break;
        case 4:
            result = divide(a, b);
            printf("Result: %.2f\n", result);
            break;
        default:
            printf("Invalid choice.\n");
    }

    return 0;
}