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| #include<iostream.h> | |
| #include<stdlib.h> | |
| #define pi 3.14 | |
| void main() | |
| { | |
| int a,r; | |
| cout<<"Enter the Radius of the circle:\t"; | |
| cin>>r; | |
| a=pi*r*r; | |
| cout<<"The area of the circle is:\t"<<a<<endl; | |
| system("pause"); | |
| } |
Output:
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