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leetcode --344. Reverse String

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 = 0 ; 5             int j = s.size()-1; 6             while(i<j) 7             { 8                 char temp = s[i]; 9                 s[i++] = s[j];10                 s[j--] = temp;;11  12             }13             return s;14     }15 };

 

 1 class Solution{ 2 public: 3     string reverseString(string s){ 4         int i , j , n; 5         n = strlen(s); 6         char* tmp = (char*)malloc(sizeof(char)*(n+1)); 8         for(i=n,j=0;i>0;i--,j++) 9            tmp[j] = s[i-1];11         tmp[n] = \0;13         return tmp ;14     }15 };

 

leetcode --344. Reverse String