Write a program in C++ to print Floyd’s Triangle by using the friend function.
If we declare a function friend int show(T4Tutorials_Floyds_Triangle);as a friend in a class T4Tutorials_Floyds_Trianglethen this function int show (T4Tutorials_Floyds_Triangle a)can access the private and protected members of the class T4Tutorials_Floyds_Triangle.
You must know that a global function can also be declared as a friend function of the class.
Syntax of friend function in C++
class class_name
{
…
friend return_type function_name(arguments);
…
}
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#include<iostream> using namespace std; class T4Tutorials_Floyds_Triangle { public: int i,j,p,q,n; public: int Floyds_Pattern() { cout<<"enter no.of rows"; cin>>n; } friend int show(T4Tutorials_Floyds_Triangle); }; int show (T4Tutorials_Floyds_Triangle a) { for(a.i=1;a.i<=a.n;a.i++) { if(a.i%2==0) { a.p=1; a.q=0; } else { a.p=0; a.q=1; } for(a.j=1;a.j<=a.i;a.j++) { if(a.j%2==0) { cout<<a.p; } else { cout<<a.q; } } cout<<endl; } } int main() { T4Tutorials_Floyds_Triangle a; a.Floyds_Pattern(); show(a); } |
Output
