Cumulative Sum(1D Array)

#include<bits/stdc++.h>

using namespace std;

int main()

{

int n, a, b;

cout << "Enter array size :: ";

cin >> n;

int v[n+1] = {0}, s[n+1] = {0};

cout << "\nEnter array Element :: ";

for(int i=1;i<=n;i++)

cin >> v[i];

for(int i=1;i<=n;i++)

s[i] = s[i-1] + v[i];

cout << "\nEnter Two Point in 1 to n :: ";

cin >> a >> b;

cout << "\nSummation " << a << " to " << b << " is :: " << s[b] - s[a-1] << "\n";

return 0;

}