#include<bits/stdc++.h> using namespace std; void sum1(int n,int m){ int sum1=0; for(int i=n;i<=m;i++){ sum+=i } return sum; } int main(){ c = sum1(1,10); cout<<c<<endl; c = sum1(20,30); cout<<c<<endl; cout<<c<<endl; c = sum1(35,45); return 0; }