字符串反转----将this is good 转化为good is this 输出。

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);
}