逆序输出字符串

void re(char *str, int len);
void re2(char *str);

int main()
{
char str[1024] = “I am from ShangHai”;
//char str[1024] = “a b c d e f”;

re(str, strlen(str));printf("first : |%s|\n", str);re2(str);printf("second : |%s|\n", str);return 0;

}

void re(char *str, int len)
{
int i;
for (i = 0; i < len / 2; i++)
{
char temp = str[i];
str[i] = str[len - i - 1];
str[len -i - 1] = temp;
}
}

void re2(char *str)
{
//find word
//start index + word’s length
int index = 0;
int start = 0;
int len = 0;

for (index = 0; index <= strlen(str); index++){    if (str[index] != ' ' && str[index] != '\0')    {        len++;    }    else    {        printf("start : %d  len : %d\n", start, len);        // do something        re(str + start, len);        start = start + len + 1;        len = 0;    }   }

}