PA1 - test 24. 11. 2011, 18:00 - Varianta A

#include <iostream>
#include <string>
using namespace std;

int main ( int argc, char * argv[] )
 {
  cout << "Zadejte n:" << endl;
  int n;
  cin >> n;
  if ( cin.fail() || n <= 0 )
   {
    cout << "Nespravny vstup" << endl;
    return 1;
   }

  cout << "Zadejte cisla" << endl;
  int  num, c = 0;
  string txt;
  for ( ; n != 0; n-- )
   {
    cin >> num;
    if ( cin.fail() )
     {
      cout << "Nespravny vstup" << endl;
      return 1;
     }
    txt = to_string(num); // to_string je az v c++11, proto prekladej s prepinacem -std=c++11, napriklad g++ -std=c++11 tmp.cpp
    if ( txt.find_first_of("7") != string::npos )
     c++;
   }
  cout << "Vysledek: " << c << endl;
  return 0;
 }