Calculator-week3

#include <stdio.h>

int main(){
    double num1, num2;
    char op;
    while (scanf("%lf %c %lf", &num1, &op, &num2) != EOF){
        /*if (op == '+'){
            printf("%.2lf\n", num1 + num2);
        } else if (op == '-'){
            printf("%.2lf\n", num1 - num2);
        } else {
            fprintf(stderr, "Invalid operation!\n");
        }*/
        switch (op){
            case '+':
                printf("%.2lf\n", num1 + num2);
                break;
            case '-':
                printf("%.2lf\n", num1 - num2);
                break;
            // *-> x , / zeroo
            default:
                fprintf(stderr, "Invalid operation!\n");
                break;
        }
    }
    return 0;
}