c语言 7-3

1、

#include <stdio.h>

unsigned rrotate(unsigned x, int n)
{
    return x >> n;
}

unsigned lrotate(unsigned x, int n)
{
    return x << n;
}

int main(void)
{
    unsigned x; int n;
    puts("please input the test number and move bits.");
    printf("x = "); scanf("%u", &x);
    printf("n = "); scanf("%u", &n);
    
    printf("right : %u  | left : %u
", rrotate(x, n), lrotate(x, n));
    
    return 0;
}

2、

#include <stdio.h>

unsigned rrotate(unsigned x, int n)
{
    return x >> n;
}

unsigned lrotate(unsigned x, int n)
{
    return x << n;
}

int main(void)
{
    unsigned x; int n;
    puts("please input the test number and move bits.");
    printf("x = "); scanf("%u", &x);
    printf("n = "); scanf("%d", &n);
    
    int i;
    for(;;)
    {
        puts("choose:  1 →right；2 →left");
        printf("i = "); scanf("%d", &i);
        if(i == 1 | i == 2)
            break;
        puts("input error, 1 or 2 ?"); 
    }
    
    if(i == 1)
        printf("right: %u
", rrotate(x, n));
    else
        printf("left : %u
", lrotate(x, n));
        
    return 0;
}

3、

#include <stdio.h>

unsigned rrotate(unsigned x, int n)
{
    return x >> n;
}

unsigned lrotate(unsigned x, int n)
{
    return x << n;
}

int main(void)
{
    unsigned x; int n;
    puts("please input the test number and move bits.");
    printf("x = "); scanf("%u", &x);
    printf("n = "); scanf("%d", &n);
    
    int i;
    while(!0)
    {
        puts("choose: 1 →right; 2 →left");
        printf("i = "); scanf("%d", &i);
        
        if(i == 1 || i == 2)
            break;
        puts("input error! 1 or 2 ?");
    } 
    
    if(i == 1)
        printf("right: %u
", rrotate(x, n));
    else
        printf("left : %u
", lrotate(x, n));
    
    return 0;
}

4、

#include <stdio.h>

unsigned rrotate(unsigned x, int n)
{
    return x >> n;
}

unsigned lrotate(unsigned x, int n)
{
    return x << n;
}

int main(void)
{
    unsigned x; int n;
    puts("please input the test number and move bits.");
    printf("x = "); scanf("%u", &x);
    printf("n = "); scanf("%d", &n);
    
    int i;
    do
    {
        puts("choose i: 1 →right; 2 →left");
        printf("i = "); scanf("%d", &i);
        if(i < 1 || i > 2)
            puts("input error! 1 or 2 ?");
    }
    while(i < 1 || i > 2);
    
    if(i == 1)
        printf("right: %u
", rrotate(x, n));
    else
        printf("left : %u
", lrotate(x, n));
        
    return 0;
}