Introduction
I have used CodeBlocks compiler for debugging purpose. But you can use any C++ programming language compiler as per your availability.
Write C++ program to find sum of array elements using recursion
#include <iostream>
using namespace std;
#define MAX_SIZE 100
// Function declaration
int sum(int arr[], int start, int len);
int main()
{
int arr[MAX_SIZE];
int num, i, sumofarray;
// Inputtin size and elements in array
cout<<"Enter size of the array: ";
cin>>num;
cout<<"Enter elements in the array: ";
for(i=0; i<num; i++)
{
cin>>arr[i];
}
sumofarray = sum(arr, 0, num);
cout<<"Sum of array elements: "<<sumofarray;
return 0;
}
// Recursively finding the sum of elements in an array.
int sum(int arr[], int start, int len)
{
// Recursion base condition
if(start >= len)
return 0;
return (arr[start] + sum(arr, start + 1, len));
}Result
