《Programming Pearls》 column 2中问题二中解法 （不知道对不对哦）

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/*

 * author: lx

 * date: 2011-09-16

 * brief: programming pearls column2

 */

#include <stdio.h>

#include <stdlib.h>

 

 

void

move_vector( char* b, int m, int n )

{

        int i = 0;

        int j;

        char temp;

        for ( ; i < n ; i++ )

        {

                for ( j = i; j < m; j += n )

                {

                        if ( j == i )

                                temp = *( b + j );

                        else

                                *( b + j - n ) = *( b + j) ;

                }

                printf( "temp is %c %d\n", temp, j );

                *( b + j - n ) = temp;

        }

 

        /*

         * this is especially.

         *

         */

        if ( m % n != 0 )

                move_vector( b + m - n , n, n - m%n );

         

}

 

 

int

main()

{

        char a[8] = { 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h'};

        char b[12] = {'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l' };

 

        move_vector( a, 8, 3 );

 

        int i;

        for ( i = 0; i < 8; i++ )

                printf( "%c\n", *( a + i ) );

 

        printf( "b is .............\n" );

        move_vector( b, 12, 3 );

 

        for ( i = 0; i < 12; i++ )

                printf( "%c\n", *( b + i ) );

 

        exit( 0 );

}