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C++ Exercises: Calculate the sum of the series (1*1) + (2*2) + (3*3) + (4*4) + (5*5) + ... + (n*n)

C++ For Loop: Exercise-12 with Solution

Write a program in C++ to calculate the sum of the series (1*1) + (2*2) + (3*3) + (4*4) + (5*5) + ... + (n*n).

Pictorial Presentation:

C++ Exercises: Calculate the sum of the series (1*1) + (2*2) + (3*3) + (4*4) + (5*5) + ... + (n*n)

Sample Solution :-

C++ Code :

#include <iostream>
using namespace std;

int main()
{
    int i, n, sum = 0;
    cout << "\n\n Find the sum of the series (1*1) + (2*2) + (3*3) + (4*4) + (5*5) + ... + (n*n):\n";
    cout << "------------------------------------------------------------------------------------\n";
    cout << " Input the value for nth term: ";
    cin >> n;

    for (i = 1; i <= n; i++) 
	{
        sum += i * i;
        cout << i << "*" << i << " = " << i * i << endl;
    }
    cout << " The sum of the above series is: " << sum << endl;
}

Sample Output:

 Find the sum of the series (1*1) + (2*2) + (3*3) + (4*4) + (5*5) + ...
 + (n*n):                                                              
-----------------------------------------------------------------------
-------------                                                          
 Input the value for nth term: 5                                       
1*1 = 1                                                                
2*2 = 4                                                                
3*3 = 9                                                                
4*4 = 16                                                               
5*5 = 25                                                               
 The sum of the above series is: 55  

Flowchart:

Flowchart: Calculate the sum of the series (1*1) + (2*2) + (3*3) + (4*4) + (5*5) + ... + (n*n)

C++ Code Editor:

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Previous: Write a program in C++ to find the sum of the series 1 + 1/2^2 + 1/3^3 + …..+ 1/n^n.
Next: Write a program in C++ to calculate the series (1) + (1+2) + (1+2+3) + (1+2+3+4) + ... + (1+2+3+4+...+n).

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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