Bubble Sorting

Can Somebody Explain this to me???

Code:

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#include <iostream>
#include <iomanip>
using namespace std;

int main()
{
  const int NUM_QUIZZES = 3;

  int grade[NUM_QUIZZES];    //The array to store the quiz grades
  int quiz,            // Subscript for the array grade[]
      temp,            // For swapping array elements
      pass,            // The number of the pass
      limit;          // Keeps track of how far to go on a pass

  // Get the grades

  cout << "Please enter " << NUM_QUIZZES
        << " integer quiz grades." << endl << endl;

  for (quiz = 0; quiz < NUM_QUIZZES; ++quiz)
  {
    cout << endl;
    cout << "Enter grade for quiz " << quiz + 1 << ": ";
    cin >> grade[quiz];
  }
  // Display the quiz grades

  cout << endl << endl;
  cout << "The grades you entered are as follows:" << endl;

  for (quiz = 0; quiz < NUM_QUIZZES; ++quiz)
    cout << setw(6) << grade[quiz];

  cout << endl;

  // Do the bubble sort

  limit = NUM_QUIZZES - 2;
 


  for (pass = 1; pass <= NUM_QUIZZES - 1; ++pass)
  {
          cout<<"Pass: "<<pass<<endl;//1//2
    for (quiz = 0; quiz <= limit; ++quiz)
      if (grade[quiz] > grade[quiz + 1])
      {
        temp = grade[quiz];
        grade[quiz] = grade[quiz + 1];
        grade[quiz + 1] = temp;
      }
    limit;
       
  }
  // Display the sorted quiz grades

  cout << endl << endl;
  cout << "The grades in increasing order are as follows:" << endl;
  for (quiz = 0; quiz < NUM_QUIZZES; ++quiz)
    cout << setw(6) << grade[quiz];

  cout << endl;

  return 0;
}

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why "num-quizzes minus 2", and why the "limit;" and why the "num quiz -1", under the do bubble sort comment????

it works perfectly , but i dont quiet understand how it works the bubble sorting..

Quote:

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Originally Posted by yukapuka

it works perfectly , but i dont quiet understand how it works the bubble sorting..

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So run through the algorithm with some numbers and see how it works.

i am not very familiar with what u mean by running algorithm with some numbers ???
bear in mind your talking to a beginner so please elaborate with an example or something

thanks

Quote:

---

Originally Posted by yukapuka

i am not very familiar with what u mean by running algorithm with some numbers ???
bear in mind your talking to a beginner so please elaborate with an example or something

thanks

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Pick some numbers, and pretend you are the machine, and do all the steps and see what happens.

Thanks For The Advice , Problem Is Cleared...

:)

The sort algorithm is doing a lot more comparisons than it's supposed to because of a bug with this line:

Code:

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    limit;

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It should be:

Code:

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    --limit;

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i sensed something wasnt adding up in order, even tho the program calculated correctly,
that does make a big diff thanks IMALC !!!