Bubble Sort in C

A simple program that I wrote in C language that demonstrate bubble sort algorithm. The code is very straight forward and easy to understand.

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Sample Program Output

Program Listing

bubble.c

#include <stdio.h>

#include <stdlib.h>

int main()

{

  int items[1000], num=0, a=0, b=0, change=0;

  system("cls");

  printf("\t Bubble Sort Program in C");

  printf("\n\n");

  printf("How many items?  : ");

  scanf("%d", &num);

  printf("\n\n");

  for (a= 0; a < num; a++) {

     printf("Enter item no. %d: ", a+1);

    scanf("%d", &items[a]);

  }

   printf("\n\n");

   printf("Original Arrangement of Numbers");

   printf("\n\n");

  for ( a = 0 ; a < num ; a++ ) {

     printf(" %d ", items[a]);

  }

  for (a = 0 ; a < ( num - 1 ); a++)

  {

    for (b = 0 ; b < num - a - 1; b++)

    {

      if (items[b] > items[b+1])

      {

        change       = items[b];

        items[b]   = items[b+1];

        items[b+1] = change;

      }

    }

  }

  printf("\n\n");

  printf("Asceding Order of Numbers");

  printf("\n\n");

  for ( a = 0 ; a < num ; a++ ) {

     printf(" %d ", items[a]);

  }

printf("\n\n");

printf("End of Program");

printf("\n\n");

system("pause");

}