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  1.     #include <iostream>
  2.     #include <string>
  3.  
  4.     int main()
  5.     {
  6.         std::string input;
  7.  
  8.         while (std::cin.good()) {
  9.             std::cout << "Direction? (n/s/e/w/q): ";
  10.             std::getline(std::cin, input);
  11.  
  12.             // if input is empty, input[0] would be undefined behavior.
  13.             if (input.empty())
  14.                 continue;
  15.  
  16.             switch (input[0]) // check the first character only
  17.             {
  18.                 case 'n': 
  19.                     std::cout << "You have entered a dark room.\n";
  20.                     break; // escape the switch, not the loop.
  21.  
  22.                 case 'e':
  23.                 case 's': // no break, 'e' falls thru
  24.                 case 'w': // still no break, 'e' and 's' fall thru
  25.                     std::cout << "You can't go that way.\n";
  26.                     break;
  27.  
  28.                 case 'q':
  29.                     std::cout << "bye!\n";
  30.                     return 0;
  31.                     break;
  32.  
  33.                 default:
  34.                     std::cout << "I asked you to type n, s, e, w or q, but you typed " << input << ".\n";
  35.                     break;
  36.             }
  37.         }
  38.  
  39.         return 0;
  40.     }
  41.  
  42.  
Success #stdin #stdout 0s 3476KB
comments (?)
stdin
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n
w
e
s
help
q
stdout
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Direction? (n/s/e/w/q): You have entered a dark room.
Direction? (n/s/e/w/q): You can't go that way.
Direction? (n/s/e/w/q): You can't go that way.
Direction? (n/s/e/w/q): You can't go that way.
Direction? (n/s/e/w/q): I asked you to type n, s, e, w or q, but you typed help.
Direction? (n/s/e/w/q): bye!
https://ideone.com/s4xana
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
secret

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