Beginner User Input Question

[16MjE3v7]

I need to verify that all numerical input is positive. If not, output an error message that only positive numbers are valid and reprompt one more time. I have looked around, but am pretty confused. Maybe the while loop, but I just don't understand it well.

cout <<"The cost of a hybrid car?" << endl;
cin >> hybrid_cost;

For example, what would I do after this to meet the above paragraph?

[vlad from moscow]

First of all you can define the type of the entered object as unsigned.

Otherwise you can write

int hybrid_cost = 0;

do
{
   cout <<"The cost of a hybrid car?" << endl;
   cin >> hybrid_cost;
} while ( ! ( 0 < hybrid_cost ) );