Setting a limit

Question

How do I set a limit for a variable that will be entered by the user using cin statement.

int a;
cin >> a;

how do I set a limit of 40 for the value entered for the variable a

Answer 1

int a;

do
{
cin >> a;
if (a > 40) std::cout << "Over limit! Try again\n";
}
while (a > 40);

// or simply

cin >> a;

if (a > 40) a = 40;

// proceed.