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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main() {
  5.     int tong = 0;
  6.  
  7.     for (int i = 1; i <= 20; i++) {
  8.         tong += i;
  9.     }
  10.  
  11.     cout << "Tong tu 1 den 20 la: " << tong << endl;
  12.  
  13.     return 0;
  14. }
Success #stdin #stdout 0.01s 5284KB
comments (?)
stdin 
Standard input is empty
stdout 
Tong tu 1 den 20 la: 210
https://ideone.com/h7IgAp
language:
C++ (gcc 8.3)
created:
3 days ago
visibility:
public

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