SWITCH STATEMENT C++

Question

Can I use a range in a switch statement in C++ e.g In a program where a student gets a grade assigned to their score, is it correct to do this:

int score;
cin >> score;

switch (score)
case (score>=90)
cout << 'A';
break;

case (score >=80)
cout << 'B';
break;

case ..... and so forth till F

Answer 1

Not as standard, rather as an extension in gcc compilers.

https://gcc.gnu.org/onlinedocs/gcc/Case-Ranges.html

Answer 2

Why Not ?

Answer 3

C++ Switch

https://www.w3schools.com/cpp/cpp_switch.asp

Answer 4

Your code has a problem.
switch uses a variable inside it's (), then it will execute the whole code in it's curly brackets. To run switch, You'll need a variable inside (), a couple of curly brackets({}), then you will do the case command inside the curly brackets.
A code for example:
#include <iostream>
using namespace std;
int main() {
cout << "Type 1 to start the game and type 2 to leave the game!" << endl;
cin >> option
switch(option) {
case 1:
cout << "You entered the game!";
break;
case 2:
cout << "You left the game!:C" << endl;
return 0;
}
}