题解 | #单词倒排#

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <ctype.h>
void my_printf(char* p,int left,int right)
{
    //int len = right  - left;
    for(int i=left;i<=right;i++)
    {
        printf("%c",p[i]);
    }
    printf(" ");
}
int __isalpha(char c)
{
    if((c>='a'&&c<='z')||(c>='A'&&c<='Z'))
        return 1;
    else
        return 0;
}
int main()
{
    char str[10000];
    gets(str);
    int len = strlen(str);
    int left,right;
    int i = len-1;
    int start_flag =0;
    while(i>=0)
    {
        if(start_flag==0)
        {
            if(__isalpha(str[i])==1)
            {
                start_flag =1;
                right =i;
            }
        }
        if(start_flag==1)
        {
            if(i==0&&__isalpha(str[i])==1)
            {
                my_printf(str,0,right);
            }
            else if(__isalpha(str[i])==0)
            {
                start_flag =0;
                left =i;
                my_printf(str,left+1,right);
            }
        }
        i--;
    }
    return  0;
}