#include <iostream> using namespace std; int main() { int num1, num2; int i, sum = 0; cout << "Please enter two integers: " << endl; cin >> num1 >> num2; for (i = num1; i <= num2; i++) { sum += i; } cout << "The sum of " << num1 << "~" << num2 << ": " << sum; return 0; }
#include<iostream>
using namespace std;
int main()
{ int a, b, c = 0; for (a = 2; a <= 9;a++) { c += a; } cout << c << endl; system("pause"); return 0;
}