LeetCode 504. Base 7

標籤：lag   ==   its   lse   abs   ati   etc   insert   tput   

Given an integer, return its base 7 string representation.

Example 1:
Input: 100
Output: "202"

Example 2:
Input: -7
Output "-10"

Note: The input will be in range of [-1e7, 1e7].

class Solution { //水題public:    string convertToBase7(int num) {        string ans;        int flag=0;        if(num<0)            flag=1;        else if(num==0)            ans.insert(ans.begin(),1,'0');        num=abs(num);        while(num){            ans.insert(ans.begin(),1,'0'+num%7);            num/=7;        }        if(flag)            ans.insert(ans.begin(),1,'-');        return ans;    }};

LeetCode 504. Base 7