#include<stdio.h>

int main() {

    char op;
    double first,second;
    printf("Enter an operator (+,-,*,/): ");
    scanf("%c",&op);
    printf("Enter two operands: ");
    scanf("%lf %lf",&first,&second);

    switch (op){
        case'+':
          printf("%1lf + %1lf=%1lf",first,second,first+second);
        break;
        case'-':
          printf("%1lf - %1lf=%1lf",first,second,first-second);
        break;
        case'*':
          printf("%1lf * %1lf=%1lf",first,second,first*second);
        break;
        case'/':
          printf("%1lf / %11lf=%1lf",first,second,first/second);
        break;
        //operator does not match any case constant
        default:
        printf("Error!operator is not correct");
   }

    return 0;
}