list0704.cpp

teach yourself C++ in 21 days 第五版

// Listing 7.4 -  Demonstrates break and continue
#include <iostream>

int main()
{
   using namespace std;

   unsigned short small;
   unsigned long  large;
   unsigned long  skip;
   unsigned long target;
   const unsigned short MAXSMALL=65535;

   cout << "Enter a small number: ";
   cin >> small;
   cout << "Enter a large number: ";
   cin >> large;
   cout << "Enter a skip number: ";
   cin >> skip;
   cout << "Enter a target number: ";
   cin >> target;

   cout << "\n";

   // set up 3 stop conditions for the loop
   while (small < large && large > 0 && small < MAXSMALL)
   {
      small++;

      if (small % skip == 0)  // skip the decrement?
      {
         cout << "skipping on " << small << endl;
         continue;
      }

      if (large == target)    // exact match for the target?
      {
         cout << "Target reached!";
         break;
      }

      large-=2;
   }                   // end of while loop

   cout << "\nSmall: " << small << " Large: " << large << endl;
   return 0;
}