题解 | #单词倒排#

#include <stdio.h>
#include<string.h>
int main() {
    char std[10001] = { 0 };
    fgets(std, 10001, stdin);
    char word = 0;
    int i = 0;
    int len= strlen(std);
    int j = len-1;
    for(i=len-1;i>=0;i--)
    {
        if (std[i] < 'A'|| std[i] > 'Z'&& std[i] <'a' || std[i] > 'z')
        {
            std[i] =0;
        }
        if (std[i] == 0 && std[i + 1]!= 0)
        {
            int m = i + 1;
            for (m; m < j; m++)
            {
                printf("%c", std[m]);
            }
            printf(" ");
            j = i;
        }
        else if (std[i] == 0 && std[i + 1]== 0)
        {
            j = i;
        }
    }
    for (i = 0; i < j; i++)
    {
        printf("%c", std[i]);
    }
    printf("\n");
    return 0;
}