题解 | #句子逆序#

#include <stdio.h>
#include <string.h>
void reverse(char *s,int start,int end)
{
    int low=start;
    int high=end;
    while(high>low)
    {
        char flag=s[low];
        s[low]=s[high];
        s[high]=flag;
        low++;
        high--;
    }
}
int main() {
    char str[1000];
    gets(str);
    int len=strlen(str);
    reverse(str,0,len-1);
   
    int low=0;
    int high=0;
    for(int i=0;i<len;i++)
    {
        if(str[i]==' ')
        {
            high=i;
            reverse(str,low,high-1);
            low=high+1;
        }
    }
    reverse(str,high+1,len-1);
    printf("%s",str);
}