编写一个函数,其作用是将输入的字符串反转过来。
示例 1:
输入: "hello" 输出: "olleh"
示例 2:
输入: "A man, a plan, a canal: Panama" 输出: "amanaP :lanac a ,nalp a ,nam A"
class Solution {
public String reverseString(String s) {
int i = 0;
int j = s.length()-1;
char[] t = s.toCharArray();
while(i <= j){
char c = t[i];
t[i] = t[j];
t[j] = c;
i++;
j--;
}
return new String(t);
}
}
class Solution {
public:
string reverseString(string s) {
int left = 0;
int right = s.size()-1;
while(left < right){
swap(s[left++],s[right--]);
}
return s;
}
};