[問題] 迴文
開發平台(Platform): (Ex: VC++, GCC, Linux, ...)
code::block
額外使用到的函數庫(Library Used): (Ex: OpenGL, ...)
問題(Question)：
爲什麼可以直接相加?
程式碼(Code)：(請善用置底文網頁, 記得排版)
#include <iostream>
#include <string>
using namespace std;
int main() {
string s1 ,s2;
while(cin >> s1 ) {
for(int i = 1 ; i <= s1.length() ; i++) {
s2 += s1[s1.length()-i] ;
}
if(s1==s2)
cout << "yes" << endl ;
else
cout << "no" << endl ;
s2 = "";
}
return 0;
}
補充說明(Supplement)：
小弟在高中生解題系統上練習,本來是用getline的想法去寫
可是在google後找到這段程式碼,請教各位先進
爲什麼可以直接s2+=s1[s1.lenght()-1],好抽象
懇請各位解惑
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