字符串逆置

void Reverse_char(char* str)
{
	int len = strlen(str);
	int i = 0;
	int j = len - 1;

	while (i < j)
	{
		char tmp = str[i];
		str[i] = str[j];
		str[j] = tmp;
		i++;
		j--;
	}
}
int main ()
{
char str[100] = { 0 };
gets_s(str, 100-1);
Reverse_char(str);
printf("%sn", str);

return 0;
}