思路：现将整个字符串反转，再将每个单词反转；

#include "iostream"

#include "cstring"

using namespace std;

void reverse_word(char*p,char*q){

    char temp;

    while(q>p){

        temp=*p;

        *p=*q;

        *q=temp;

        q--;

        p++;

    }

}

char* indexofnoletter(char*p){

    char*t=p;

    while(*t!=' '&&*t!='\0')

        t++;

    return --t;

}

void main(){

    char a[]="this is good";

    puts(a);

    reverse_word(a,a+strlen(a)-);

    char*p,*q;

    p=a;

    do{

        q=indexofnoletter(p);

        reverse_word(p,q);

        p=q+;

    }while(p<=a+strlen(a)-);

    puts(a);

}