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Home » Tip Bank » C++
Language: C++
Expertise: Beginner
Mar 8, 2002

Exiting a Nested Loop


Sometimes, you need to exit a nested loop early, and the break; statement will only let you exit one level of a loop. Use a flag to indicate if the loop should be exited.
 
bool abort = false;
for(int i = 0; (i < 100) && (! abort); i++)
{
   for(int j = 0; (j < 100) && (! abort); j++)
   {
      for(int k = 0; (k < 100) && (! abort); k++)
      {
         if(k == 15)
         {
             abort = true;
             break;
         }
      }//end k loop.
   }//end j loop.
}//end i loop.

if (abort)
{
        // handle premature loop exit here
}
else
{
        // handle normal loop exit here
}
Kent Schnaith
 
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