将字符串转化为整数
将字符串转化为整数
http://www.nowcoder.com/questionTerminal/44d8c152c38f43a1b10e168018dcc13f
C++ 4行
class Solution {
public:
int atoi(const char *str) {
if(str[0] == '\0') return 0;
stringstream ss(str);
int res;ss >> res;
return res;
}
};