following is code for calculating are of circle with user input and without.


  • code taking input from user:-


#include<iostream.h>
void main()
{
int l,b,h;
float a;
cout<<"enter the value of length,breadth,height"<<endl;
cin>>l>>b>>h;
a=l*b*h;
cout<<"area of rectangle is="<<a;
}

note:-it's just a sudo code if its not executing on your device make some changes in the further code this is only for understanding logic.

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