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define a class to perform swap operation include 2 data members a&b &member function to input values,swap the value& display the value
class swap 
{
int a,b; 
public void swap() 
{
cout<<"Before swapping";
cout<<"Enter the no. "; 
cin>>a>>b;
a=a+b;
b=a-b;
a=a-b;
cout<<"After swapping";
cout<<"a= "<<a;
cout<<"b= "<<b; 
 }
} 


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