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  1. #include <iostream>
  2. //#include <fstream>
  3. using namespace std;
  4.  
  5. int main() {
  6.     //ifstream File("file.txt");
  7.     istream &File = cin;
  8.     if (true/*File.is_open()*/) {
  9.         int num, count = 0, sum = 0;
  10.         while (File >> num) {
  11.             ++count;
  12.             sum += num;
  13.         }
  14.         if (File.eof()) {
  15.             cout << "count: " << count << endl;
  16.             cout << "sum: " << sum << endl;
  17.             if (count != 0) {
  18.                 int average = sum / count;
  19.                 cout << "average: " << average << endl;
  20.             }
  21.         }
  22.         else {
  23.             cerr << "File read error" << endl;
  24.         }
  25.     }
  26.     else {
  27.         cerr << "File open error" << endl;
  28.     }
  29.     return 0;
  30. }
Success #stdin #stdout 0s 4380KB
comments (?)
stdin
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1 2 3 4 5
stdout
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count: 5
sum: 15
average: 3
https://ideone.com/PoroPT
language:
C++14 (gcc 8.3)
created:
5 years ago
visibility:
public

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