In: Computer Science

Write a function sum_int( n ) to compute the sum of the integers from 1 up to and including n.

Dear Student,

here is the **C++** program which implement
this.

**NOTE:** Please not that the below program is
tested on ubuntu 14.04 sytem and compiled under g++ compiler.

**Program:**

**------------------------------------------------------------------------------------------------------------------------------------**

#include <iostream>

#include <stdlib.h>

using namespace std;

//function prototype

int sum_int(int n);

int main()

{

int num;

cout<<"Enter a Natural number: ";

cin >> num;

cout<<"Sum of the integer from 1 to "<<num<<" Number is "<<sum_int(num)<<endl; //Function Calling

return 0;

}

//Recursive Function Prototype

int sum_int(int n)

{

if(n != 0)

return n + sum_int(n-1);

else

return n;

}

----------------------------------------------------------------------------------------------------------------------------------

Here i have attached the output of the program as a screen shot..

**Output:**

**-----------------------------------------------------------------------------------------------------------------------------------**

**--------------------------------------------------------------------------------------------------------------------------------------------**

**Kindly Check and Verify Thanks....!!!**

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**********************************************************************************
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