Write a C++ program of friend function to display a pattern for a number of rows using a number which will start with the number 1 and the first and the last number of each row will be 1. The pattern is as follows:
If we declare a function friend int show(T4Tutorials); as a friend in a class T4Tutorials then this function friend int show(T4Tutorials); can access the private and protected members of the class T4Tutorials. 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 { public: int i,j,k,l,n; public: int pattern() { cout<<"enter num of rows"; cin>>n; } friend int show(T4Tutorials); }; int show (T4Tutorials a) { for(a.i=1;a.i<=a.n;a.i++) { for(a.l=1;a.l<=a.n-a.i;a.l++) { cout<<" "; } for(a.j=1;a.j<=a.i;a.j++) { cout<<a.j; } for(a.k=a.i-1;a.k>=1;a.k--) { cout<<a.k; } cout<<endl; } }; int main() { T4Tutorials a; a.pattern(); show(a); } |
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I welcome to all of you if you want to discuss about any topic. Researchers, teachers and students are allowed to use the content for non commercial offline purpose. Further, You must use the reference of the website, if you want to use the partial content for research purpose.
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