Flowchart Question

This is a discussion on Flowchart Question within the C Programming forums, part of the General Programming Boards category; Hello Everyone, I am trying to flowchart the following code but I am getting stuck on the nested loops. Can ...

  1. #1
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    Flowchart Question

    Hello Everyone,

    I am trying to flowchart the following code but I am getting stuck on the nested loops. Can someone help me understand how the code flows.

    Code:
    #include<stdio.h>
    #define SIZE 10
    
    int main()
    {
        
        int a[ SIZE ] = { 10, 9, 8, 7 , 6, 5, 4, 3, 2, 1 }; /* Use initializer list to initialize array a */
        int counter; /* Variable in which counter will be stored */
        int pass; /* Variable in which pass will be stored */
        int hold; /* Variable in which hold will be stored */
        int swap; /* Variable in which swap will be stored */
        
        printf( "Data items in original order\n" );
        
        /* Output original array */
        for( counter = 0; counter < SIZE; counter ++ ) {
            printf( "%4d", a[ counter ] );
        } /* End for */
        
        printf( "\n\n" );
        
        /* Bubble sort */
        for( pass = 1; pass < SIZE; pass ++ ) {
        
            swap = 0;
            
            /* Loop to control number of comparisions per pass */
            for( counter = 0; counter < SIZE - 1; counter ++ ) {
            
                    /* Compare adjacent elements and swap them if first
                       element is greater than second element */
                    if( a[ counter ] > a[ counter + 1 ] ) {
                       swap = 1;
                       hold = a[ counter ];
                       a[ counter ] = a[ counter + 1 ];
                       a[ counter + 1 ] = hold;
                    } /* End if */
            } /* End for */
                            
            printf( "Pass %d: ", pass );
            
            /* Loop to control if a swap has been made per pass */
            for( counter = 0; counter <= SIZE - pass; counter ++ )
                    printf( " %d", a[ counter ]);
                    printf( "\n" );
                    if( swap != 1 )
                          break;
            
        } /* End for */
        
        printf( "\nData items in ascending order\n" );
        
        /* Output sort array */
        for( counter = 0; counter < SIZE; counter ++ ) {
            printf( "%4d", a[ counter ] );
        } /* End for */
        
        printf( "\n" );
        
        return 0; /* Indicates successful termination */
        
    }
    Thanks in advance

    DMKanz07

  2. #2
    and the hat of wrongness Salem's Avatar
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    Well it's not exactly a bubble sort to begin with.

    Code:
    for ( sorted = SIZE-1 ; sorted > 0 ; sorted-- ) {
      for ( toSort = 0 ; toSort < sorted ; toSort++ ) {
        // compare a[sorted] with a[toSort] and swap
      }
      // at this point, you can say a[sorted] is in the correct position
    }
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
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