题解 | #字符串反转#
字符串反转
http://www.nowcoder.com/practice/e45e078701ab4e4cb49393ae30f1bb04
双指针
#include<iostream> #include<string> #include<algorithm> #include<iterator> using namespace std; int main() { string str; cin>>str; int n = str.size(); int i = 0; int j = n - 1; while(i < j) { swap(str[i++], str[j--]); } cout<<str; return 0; }