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C++ Exercises: Print the Floyd's Triangle

C++ For Loop: Exercise-43 with Solution

Write a program in C++ to print the Floyd's Triangle.

Sample Solution:-

C++ Code :

#include <iostream>
using namespace std;

int main()
{
   int i,j,n,p,q;
    cout << "\n\n Print the Floyd's Triangle:\n";
    cout << "--------------------------------\n";
    cout << " Input number of rows: ";
    cin >> n;
   for(i=1;i<=n;i++)
   {
     if(i%2==0)
     { 
	 p=1;q=0;
	 }
     else
     { 
	 p=0;q=1;
	 }
      for(j=1;j<=i;j++)
	 if(j%2==0)
	    cout<<p;
	 else
	    cout<<q;
     cout<<endl;
   }
}

Sample Output:

 Print the Floyd's Triangle:                                           
--------------------------------                                       
 Input number of rows: 5                                               
1                                                                      
01                                                                     
101                                                                    
0101                                                                   
10101

Flowchart:

Flowchart: Print the Floyd's Triangle

C++ Code Editor:

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Previous: Write a program in C++ to display the pattern like a pyramid using asterisk and each row contain an odd number of asterisks.
Next: Write a program in C++ to display the pattern like a diamond.

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C++ Programming: Tips of the Day

What is a smart pointer and when should I use one?

This answer is rather old, and so describes what was 'good' at the time, which was smart pointers provided by the Boost library. Since C++11, the standard library has provided sufficient smart pointers types, and so you should favour the use of std::unique_ptr, std::shared_ptr and std::weak_ptr.

There was also std::auto_ptr. It was very much like a scoped pointer, except that it also had the "special" dangerous ability to be copied - which also unexpectedly transfers ownership.

It was deprecated in C++11 and removed in C++17, so you shouldn't use it.

std::auto_ptr<MyObject> p1 (new MyObject());
std::auto_ptr<MyObject> p2 = p1; // Copy and transfer ownership. 
                                 // p1 gets set to empty!
p2->DoSomething(); // Works.
p1->DoSomething(); // Oh oh. Hopefully raises some NULL pointer exception.

Ref : https://bit.ly/3mc9GHE