How to include a class with C++ main program

It’s very easy to include a class with a C++ main program. Just follow the following steps; Step 1: Start with header files. Step 2: adding the namespace. Step 3: Declaring and defining the class. Step 4: Starting the main function. Step 5: In the main function, creates the one or many objects of the class. Step 6: Call the functions of the class in the main function with the help of class objects. Let’s see it with an example.

Example of including a class with C++ main program

C++ program to print a hollow square or rectangle star pattern by using the class with C++ main program.

hollow square or rectangle star pattern C++

#include<iostream>
using namespace std;
class a
{
	protected:
		int n,i,j;
	public:
			int out()
			{
				cout<<"enter number";
				cin>>n;
				for(i=1;i<=n;i++)
				{
					for( j=1;j<=n;j++)
					{
						if(i==1||i==n||j==1||j==n)
						{
							cout<<"*";
						}
						else
						{
							cout<<" ";
						}
					}
					cout<<endl;
				}
			}
};
int main()
{
	a c;
    c.out();
}

#include<iostream>

using namespace std;

class a

{

protected:

int n,i,j;

public:

int out()

{

cout<<"enter number";

cin>>n;

for(i=1;i<=n;i++)

{

for( j=1;j<=n;j++)

{

if(i==1||i==n||j==1||j==n)

{

cout<<"*";

}

else

{

cout<<" ";

}

cout<<endl;

}

};

int main()

{

a c;

c.out();

}

Output

How to include a class with C++ main program

How to include a class with C++ main program
By: Prof. Dr. Fazal Rehman | Last updated: March 3, 2022

Example of including a class with C++ main program

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