How use this in calculator ?

Question

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 / %.1lf = %.1lf", first, second, first / second);
break;
// operator doesn't match any case constant default:
printf("Error! operator is not correct");
}

Answer 1

You need to put that code in main function. This way it won't work.

Answer 2

BABLU TAUNWAL
I read your message, but can't respond in DM.

If you want to make an online calculator then you need to learn web development with HTML, CSS and JS.

I suggest you to search Code Playground for web projects with calculator ideas and learn from the codes 👍

Answer 3

Ok thanks Ipang

Answer 4

This is the code from where you have taken reference:

https://code.sololearn.com/cjxo10O7D1t0/?ref=app

https://code.sololearn.com/cKr53g5to7Pp/?ref=app
https://code.sololearn.com/c6KolmU1s7oC/?ref=app

https://code.sololearn.com/c1Fxg8pz9xnu/?ref=app
https://code.sololearn.com/c5Gc20z9wvnc/?ref=app