Calculator Program

#include <stdio.h>
int main() {
    int a, b;
    char op;
    printf("Enter two numbers: ");
    scanf("%d%d", &a, &b);
    getchar(); 
    printf("Enter an operator (+, -, *, /): ");
    scanf("%c", &op);
    switch (op) {
        case '+':
            printf("Addition is %d\n", a + b);
            break;
        case '-':
            printf("Subtraction is %d\n", a - b);
            break;
        case '*':
            printf("Multiplication is %d\n", a * b);
            break;
        case '/':
            if (b != 0) {
                printf("Division is %d\n", a / b);
            } else {
                printf("Error: Division by zero is not allowed.\n");
            }
            break;
        default:
            printf("Invalid operator.\n");
            break;
    }

    return 0;
}