C语言实现数组的循环左移，右移，翻转

 1#include <stdio.h>
 2#include <stdlib.h>
 3#include <string.h>
 4#define  NR(x)  (sizeof(x)/sizeof(x[0]))
 5//数组左移 
 6int buffer_left_move(int *buffer , int buf_len)
 7{
 8    int i ;
 9    char tmp = buffer[0];
10    for(i = 1 ; i < buf_len ; i++)
11    {
12        buffer[i-1] = buffer[i] ;
13    }
14    buffer[buf_len-1] = tmp ;
15}
16//数组右移 
17int buffer_right_move(int *buffer , int buf_len)
18{
19    int i ;
20    char tmp = buffer[buf_len - 1];
21    for(i = buf_len ; i > 0 ; i--)
22    {
23        buffer[i] = buffer[i-1] ; 
24    }
25    buffer[0] = tmp ;
26}
27//数组翻转 
28int buffer_turn_over(int *buffer , int buf_len)
29{
30    int size = buf_len ; 
31    int i , tmp; 
32    for(i = 0 ; i < size/2 ; i++)
33    {
34        tmp = buffer[i] ; 
35        buffer[i] = buffer[size-1-i] ;
36        buffer[size-1-i] = tmp;
37    }
38}
39//打印数组 
40void print_buffer(int *buffer, int buf_len)
41{
42    int i ;
43    system("cls");
44    printf("please input \'a' or \'b' or \'w' \n");
45    for(i = 0 ; i < buf_len ; i++)
46    {
47        printf("%d",buffer[i]);
48    }
49    putchar('\n');
50}
51
52int main(void)
53{
54    int buffer[5] = {1,2,3,4,5} ;
55
56    print_buffer(buffer,NR(buffer));
57    while(1)
58    {
59        switch(getch())
60        {   
61            //左边 
62            case 'a': 
63                    buffer_left_move(buffer,NR(buffer)) ;
64                    print_buffer(buffer,5);
65                    break ;
66            //右边 
67            case 'd':  
68                    buffer_right_move(buffer,NR(buffer));
69                    print_buffer(buffer,5);
70                    break ;
71            //翻转 
72            case 'w':
73                    buffer_turn_over(buffer,NR(buffer)) ;
74                    print_buffer(buffer,5);
75                    break ;
76        }
77    }
78    return 0 ; 
79}