Convert string to int

Question

Why it output 50?
#include <iostream>
using namespace std;

int main() {
cout << '2' + '2' - '2';
return 0;
}
// output: 50

Answer 1

In this case, the ASCII value of characters were involved in the addition and subtraction operations.

http://www.asciitable.com/mobile/

The character '2' has an ASCII value of 50.

50+50-50 is 50.

Answer 2

That is not a string, since it is enclosed in single quote, therefore '2' is a char, and the ASCII value of char '2' is 50..
Therefore the expression is 50 + 50 - 50
and prints 50 as output

Answer 3

Thank you so much.