A basic Calculator program using Switch in C

# include <stdio.h>

int main() {

    char operator;
    int firstNumber,secondNumber;

    printf("Enter an operator (+, -, *,/): ");
    scanf("%c", &operator);

    printf("Enter two operands: ");
    scanf("%d %d",&firstNumber, &secondNumber);

    switch(operator)
    {
        case '+':
            printf("%d + %d = %d",firstNumber, secondNumber, firstNumber + secondNumber);
            break;

        case '-':
            printf("%d - %d = %d",firstNumber, secondNumber, firstNumber - secondNumber);
            break;

        case '*':
            printf("%d * %d = %d",firstNumber, secondNumber, firstNumber * secondNumber);
            break;

        case '/':
            printf("%d / %d = %d",firstNumber, secondNumber, firstNumber / firstNumber);
            break;
 default:
            printf("Error! operator is not correct");
    }
   
    return 0;
}