Anyone know how to set ranges in variables

Question

This is what I am trying to do. I guess by looking at the code you get the idea.

#include <iostream>
using namespace std;

int main()
{
int mark = 64;

if (mark < 65) {
cout << "You failed." << endl;
cout << "Sorry" << endl;
}
else {
cout << "Congratulations!" << endl;
cout << "You passed." << endl;
cout << "You are awesome!" << endl;
}
if (60 - 65) {
cout << "below a d";
}
if (70 - 79) {
cout << "you have a c";
}

return 0;
}

Answer 1

use this
if(mark>=60 & & mark<=65)
and same idea for others

Answer 2

thanks!