C/C ++: Progress indicator

 today I've taken to find out: victory:. Then I show you the code and Briefly Explain It does not and Have a lot of mystery That Once You put on it.

/ / ================================================ ================

/ /

/ / Filename: percentage.cpp

/ /

/ / Description:

/ /

/ / Version: 1.0

/ / Created: 10/11/09 11:51:42

/ / Revision: none

/ / Compiler: g + +

/ /

/ / ================================================ ================

# Include <iostream>

# Include <cstdlib>

# Include <ctime>

using namespace std;

/ / ============================================ === FUNCTION ========

/ / Name: main

/ / Description:

/ / ================================================ ===============

int main ()

{

   try

   {

      unsigned int Operations = 500;

      float inc = 100.0f / ( static_cast < float > (operations) -1.0);

      float progress = 0.0f;

      for (unsigned int i = 0; i <Operations; i + +)

      {

         usleep (10000);

         progress + = inc;

         court << "Progress:" << static_cast <unsigned int > (progress)

                 << "% \ r" <<flush;

      }

   court <<endl;

   }

   catch (exception & ex)

   {

      court <<ex.what () <<endl;

   }

   return EXIT_SUCCESS;

}

The most important thing we can find it on line 39. \ r is an escape character that allows us to position the cursor at the beginning of the line, while flush allows us to synchronize the buffer associated with a stream . Christian, that shows us what we want to show without having to enter a carriage return. The rest is just running so you can see an example. In line 36 we find the function usleep sleep that allows the process X microseconds, while the calculation in line 32 increases the variable progress in each operation.