leetcode 8. 字符串转换整数 (atoi)

class Solution

{

public:

int myAtoi(string s)

{

string int_max = "2147483647";

string int_min = "2147483648";

string num = "";

int i = 0;

int len = s.size();

... for(auto it:newnum)

{

ans = ans*10+(it-48);

}

return ans*-1;

}

}

};