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