“I am a student”反转成“student a am I”

#include <stdio.h>void main()
{    char str[]="you are a student";
    printf(str);
    printf("\n");    char *p,*q;    char temp;
    p=q=str;    while(*q!=‘\0‘)
    {
        q++;
    }
    q--;    while(p<=q)
    {
        temp=*p;        *p=*q;        *q=temp;
        p++;
        q--;
    }//反转整个字符串
    printf(str);
    printf("\n");    char *s;
    q=p=s=str;//指针指向开始位置
    while(*q!=‘\0‘)
    {        if(*q==‘ ‘||*(q+1)==‘\0‘)
        {
            p--;            if(*(q+1)==‘\0‘)//处理最后一个字串
                p++;            while(s<=p)
            {
                temp=*p;                *p=*s;                *s=temp;
                s++;
                p--;
            }//反转局部字符串
            s=q+1;
            p=q;
        }
        q++;
        p++;
    }

    printf(str);
    printf("\n");
}