c语言-字符串中每个单词翻转

#define _CRT_SECURE_NO_WARNINGS 1
#include 
#include 

Reverse1(char* start, char* end)  //字符串整体翻转
{
	char  t = 0;
	while (start < end)
	{
		t = *start;
		*start = *end;
		*end = t;
		start++;
		end--;
	}
}

void Reverse2(char* start)  //每个单词整体翻转
{
	while (*start)
	{
		char* end = start;
		while (*end != ' ' && *end != '')
		{
			end++;
		}
		Reverse1(start, end - 1);

		if (*end == ' ')
		{
			start = end + 1;
		}
		else
		{
			start = end;
		}
	}
}

int main()
{
	char str[100] = { 0 };  //I like BeiJing.
	int i = 0;
	gets(str);  //scanf("%s", &a)  输入字符串时遇到空格就停止写入字符串 gets(数组名)  输入字符串可以有空格
	puts(str);  //打印字符串

	int len = strlen(str);
	Reverse1(str, str + len - 1);  //字符串整体翻转  .gniJieB ekil I
	puts(str);
	Reverse2(str);  //每个单词整体翻转  BeiJing. like I
	puts(str);
	return 0;
}