[問題] 字串反轉recursive問題
char *rflip(char *str,int length)
{
if(*str=='\0')
return str;
char *temp = rflip(&str[1],--length);
temp[length] = *str;//問題點
temp[length+1] = '\0';//為了最後跳離recursive結尾填上'\0'用的
return temp;
}
int main()
{
char a[4] = "abc";
char *b = rflip(a,strlen(a));
cout << b;
return 0;
}
以上是我自己嘗試的字串反轉，其實只是想嘗試一下沒想到就成功了
但我本來以為問題點會有問題(因為我並沒有宣告矩陣大小，temp只是一個pointer)
沒想到把它當矩陣寫卻有矩陣的效果
想請問一下為什麼這樣可以成功呢?
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