Write a program to print sum of series (1)+(1+3)+(1+3+5)+(1+3+5+7).....n using go to statement

Question

using goto

Answer 1

#include <iostream>
using namespace std;

int main() {
unsigned sum = 0, subsum = 0, n;

try{
cin >> n;
}catch(...){
cout << "Bad input" << endl;
return -1;
}

unsigned i = 0;
loop:sum += subsum += 2*i + 1;
if(++i < n)
goto loop;

cout << sum << endl;

return 0;
}

Answer 2

For n == 3 :
1 + (1+3) + (1+3+5)