guessword.cpp

C++大学简明教程,解压就行没有密码。希望对大家有用

// Exercise 20.16: GuessWord.cpp
// Application provides an word-guessing game to users.
#include <iostream> // required to perform C++ stream I/O 
#include <string>   // required to access string functions
#include <ctime>    // contains prototype for function time
#include <exception> // required to use exceptions
#include <stdexcept> // required for out_of_range exception

// contains function prototypes for functions srand and rand
#include <cstdlib>

using namespace std; // for accessing C++ Standard Library members

// array of words to be scrambled
const string WORD_LIST[] = { "class", "function",
   "member", "stream", "program", "application", "basic",
   "debugger", "database", "files", "inheritance", "assembly",
   "multimedia", "enumeration", "pointers", "arrays", "strings",
   "references", "manipulator", "structures" };

// function prototype
int nextWord( string & );

// function main begins program execution
int main ()
{
   // define variables
   string text;                // stores user's guess
   string display;             // stores the hidden word
   int index;                  // stores the letter to display
   bool correctAnswer = false; // true is the user guessed correctly

   // randomize random number generator using current time
   srand( time( 0 ) );

   // select word and display hidden word, returns word's index
   int randomNumber = nextWord( display ); 

   // repeat while user has not guessed correctly
   do
   {
      // prompt user for and input guess (or index)
      cout << "\nEnter number of character to reveal or guess "
           << "the word: ";
      cin >> index;

      index--; // changes 1-based input to 0-based array index  

      // unhide the specified character
      display[ index ] = WORD_LIST[ randomNumber ].at( index );

      cout << "\nHidden word is: " << display << endl << endl;

   }  // end do...while
   while ( correctAnswer != true );

   return 0; // indicate that program ended successfully

} // end function main

// scramble random word and display it 
int nextWord( string &display )
{
   // generate new random number
   int randomNumber = rand() % 20;

   // select new word from array with random index
   string word = WORD_LIST[ randomNumber ];

   // loop to generate scrambled word
   for ( int counter = 0; counter < word.size(); counter++ )
   {
      display += "*";
   } // end for

   // display scrambled word
   cout << "\nHidden word is: " << display << endl;

   return randomNumber;

} // end function nextWord


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