#include <stdio.h>

float sum(float n1, float n2);
float difference(float n1, float n2);
float product(float n1, float n2);
float quotient(float n1, float n2);

int main() {
    float n1, n2, total;
    char op;

    printf("Enter an operator: ");
    scanf(" %c", &op);

    printf("Enter first number: ");
    scanf("%f", &n1);

    printf("Enter second number: ");
    scanf("%f", &n2);

    switch (op) {
        case '+':
            total = sum(n1, n2);
            printf("The sum is: %.2f\n", total);
            break;
        case '-':
            total = difference(n1, n2);
            printf("The difference is: %.2f\n", total);
            break;
        case '*':
        case 'x':
            total = product(n1, n2);
            printf("The product is: %.2f\n", total);
            break;
        case '/':
        case '÷':
            total = quotient(n1, n2);
            printf("The quotient is: %.2f\n", total);
            break;
        default:
            printf("Invalid operator.\n");
    }

    return 0;
}

float sum(float n1, float n2) {
    return n1 + n2;
}

float difference(float n1, float n2) {
    return n1 - n2;
}

float product(float n1, float n2) {
    return n1 * n2;
}

float quotient(float n1, float n2) {
    if (n2 != 0) {
        return n1 / n2;
    } else {
        printf("Error: Division by zero.\n");
        return 0;
    }
}