lotterypicker.cpp

C++大学简明教程,解压就行没有密码。希望对大家有用

// Exercise 14.16: LotteryPicker.cpp
// This application picks randomly generated numbers for a lottery.
#include <iostream> // required to perform C++ stream I/O
#include <iomanip>  // required for parameterized stream manipulators 
#include <string>   // required to access string functions
#include <ctime> // contains prototype for function time

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

using namespace std; // for accessing C++ standard library members

// function prototype
int generate( int low, int high );

// function main begins program execution
int main()
{
   // two-dimensional array to maintain unique random numbers
   bool uniqueNumber[ 4 ][ 40 ];

   // one-dimensional array to hold lottery names
   string names[ 4 ] = { "First", "Second", "Third", "Fourth" };

   // instance variable to hold the selected lottery number
   int selection;

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

   cout << endl;

   cout << "\n";
   return 0; // indicates successful termination

} // end function main

// generate random number in a given range
int generate( int low, int high )
{
   // generate random number in range from low to high
   return low + ( rand() % ( high - low + 1 ) );
   
} // end function generate


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