Untitled

#include <stdio.h>
int main()
{
    double a, b, result;
    printf("Enter two numbers : \n");
    scanf("%lf %lf", &a, &b);
    char operator;
    printf("Choose the mathematical operator [+], [-], [*] or [/] :\n");
    scanf("%c", &operator);
    switch (operator)
    {
    case 'a':
        result = a + b;
        printf("%lf", result);
        break;
    case 'b':
        result = a - b;
        printf("%lf", result);
        break;
    case '*':
        result = a * b;
        printf("%lf", result);
        break;
    case '/':
        result = a / b;
        printf("%lf", result);
        break;
    default:
        printf("Invalid operator.");
    }
    return 0;
}