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  1. #include <iostream>
  2. #include <sstream>
  3. #include <string>
  4.  
  5. using namespace std;
  6.  
  7. bool GetChoice(int *ret, int count);
  8.  
  9. void DoTaskOne() { cout << "one" << endl; }
  10. void DoTaskMany(int i) { cout << "many " << i << endl; }
  11.  
  12. void menu() { cout << "MENU" << endl; }
  13.  
  14. int main()
  15. {
  16.     bool exit = false;
  17.  
  18.     do {
  19.         int choice;
  20.         do {
  21.             menu();
  22.         }
  23.         while (!GetChoice(&choice, 5));
  24.  
  25.         switch (choice)
  26.         {
  27.             case (1):
  28.                 DoTaskOne();
  29.                 break;
  30.             case (2):
  31.                 DoTaskMany(2);
  32.                 break;
  33.             case (3):
  34.                 DoTaskMany(3);
  35.                 break;
  36.             case (4):
  37.                 continue;
  38.             break;
  39.                 case (5):
  40.                 exit = true;
  41.                 break;
  42.         }
  43.     }
  44.     while (!exit);
  45.  
  46.     return 0;
  47. }
  48.  
  49. bool GetChoice(int *ret, int count)
  50. {
  51.     string line;
  52.     getline(cin, line);
  53.     bool ok = istringstream(line) >> *ret;
  54.     ok = ok && *ret >= 1 && *ret <= count;
  55.  
  56.     if (!ok) cout <<"Bledny wybor!\n";
  57.     return ok;
  58. }
  59.  
Success #stdin #stdout 0.01s 2864KB
comments (?)
stdin
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nie liczba
9999
1
2
3
4
5
stdout
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MENU
Bledny wybor!
MENU
Bledny wybor!
MENU
one
MENU
many 2
MENU
many 3
MENU
MENU
https://ideone.com/RKpbG
language:
C++ (gcc 8.3)
created:
11 years ago
visibility:
public

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