C++ Exercises: Find the Sum of GP series

C++ For Loop: Exercise-32 with Solution

Write a program in C++ to find the Sum of GP series.

Pictorial Presentation:

Sample Solution:-

C++ Code :

#include <iostream>
#include <math.h>
using namespace std;

int main()
{
    float g1,cr,i,n,j;
    int ntrm,gpn;
    float sum=0;
    cout << "\n\n Find the Sum of GP series:\n";
    cout << "-------------------------------\n";
    cout << " Input  the starting number of the G.P. series: ";
    cin >> g1;
    cout << " Input the number of items for  the G.P. series: ";
    cin >> ntrm;
    cout << " Input the common ratio of G.P. series: ";
    cin >> cr;
/*-------- generate G.P. series ---------------*/
     cout<<"\nThe numbers for the G.P. series:\n ";
     cout<<g1<<"  ";
     sum=g1;
     for(j=1;j<ntrm;j++)
       {
        gpn=g1*pow(cr,j);
        sum=sum+gpn;
        cout<<gpn<<"  ";
       }  
/*-------- End of G.P. series generate ---------------*/
    cout<<"\n The Sum of the G.P. series:  "<<sum<<endl;	
}

Sample Output:

 Find the Sum of GP series:                                            
-------------------------------                                        
 Input  the starting number of the G.P. series: 3                      
 Input the number of items for  the G.P. series: 5                     
 Input the common ratio of G.P. series: 2                              
                                                                       
The numbers for the G.P. series:                                       
 3  6  12  24  48                                                      
 The Sum of the G.P. series:  93  

Flowchart:

C++ Code Editor:

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