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//
//
//
//
//
//
//
#include <iostream> // for cin, out
#include <iomanip>
using namespace std;
int main()
{
// 1. var. declaration
float width, height, area;
cout << fixed << showpoint << setprecision(3);
// input
cout << "input the width (-1 to quit): ";
cin >> width;
while( width > 0)
{
cout << "Input the height: ";
cin >> height;
area = width * height;
cout << "The area is: " << area << "\n";
cout << "input the width (-1 to quit): ";
cin >> width;
}
return 0;
}