question:
Write a function that takes a string as input and returns the string reversed.
Example:
Given s = "hello", return "olleh".
1 class Solution { 2 public: 3 string reverseString(string s) { 4 int i,j; 5 i=0; 6 j=s.size()-1; 7 char temp; 8 while(i<j) 9 { 10 temp=s[i]; 11 s[i]=s[j]; 12 s[j]=temp; 13 i++; 14 j--; 15 } 16 return s; 17 18 } 19 };
原文：http://www.cnblogs.com/mrlsx/p/5432974.html