给定一个不包含标点符号的字符串,如何按单词将该字符串逆序

思路分析:一共分两个步骤,第一步先按单词逆序,第二步将整个句子逆序。

代码如下:

#include "stdafx.h"
#include <stdio.h>
void ReverseWord(char* p, char* q)
{
    while (p < q)
    {
        char t = *p;
        *p = *q;
        *q = t;
        p++;
        q--;
    }
}
char* Reverse(char *s)
{
    char *p = s;
    char *q = s;
    while (*q != '\0')
    {
        if (*q == ' ')
        {
            ReverseWord(p, q - 1);
            q++;
            p = q;
        }
        else q++;
    }
    ReverseWord(p, q - 1);
    ReverseWord(s, q - 1);
    return s;
}
int main()
{
    char a[] = "I am glad to see you";
    printf("%s\n", Reverse(a));
    getchar();
    return 0;
}

    效果如图:

posted @ 2014-03-24 16:26  源子陌  Views(421)  Comments(0Edit  收藏  举报