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C++ Exercises: Display the pattern like a pyramid using number and a number will repeat for a row

C++ For Loop: Exercise-41 with Solution

Write a program in C++ to make such a pattern like a pyramid using number and a number will repeat for a row.

Sample Solution:-

C++ Code :

#include <iostream>
#include <string>
using namespace std;

int main()
{
   int i,j,spc,rows,k;
    cout << "\n\n Display such a pattern like a pyramid using number with repetition :\n";
    cout << "-------------------------------------------------------------------------\n";
    cout << " Input number of rows: ";
    cin >> rows;
   spc=rows+4-1;
   for(i=1;i<=rows;i++)
   {
         for(k=spc;k>=1;k--)
            {
              cout<<" ";
            }
	   for(j=1;j<=i;j++)
	   cout<<i<<" ";
	cout<<endl;
    spc--;
   }
}

Sample Output:

 Display such a pattern like a pyramid using number with repetition :  
-------------------------------------------------------------------------                                                                     
 Input number of rows: 5                                               
        1                                                              
       2 2                                                             
      3 3 3                                                            
     4 4 4 4                                                           
    5 5 5 5 5   

Flowchart:

Flowchart: Display the pattern like a pyramid using number and a number will repeat for a row

C++ Code Editor:

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

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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