programming-examples/c++/Others/If - Else example.cpp

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2019-11-15 12:59:38 +01:00
If - Else example
#include <iostream.h>
#include <math.h>
int main()
{
double radius;
//get user input
cout<<"Please enter the radius : ";
cin>>radius;
//act on user input
if(radius < 0.0)
cout<<"Cannot have a negative radius"<<endl;
else
cout<<"The area of the circle is "<<3.1416 * pow(radius,2)<<endl;
return 0;
}