c++ - 解析给定字符串中位置的数字

Question

我有 std::string ，其值为 1T23:

如何获得x = 1, y = 2, z = 3;

我尝试过:

int x = std::atoi(&myString.at(0));
int y = std::atoi(&myString.at(2));
int z = std::atoi(&myString.at(3));

但它返回:x = 0, y = 23, z = 3？

Answer 1

你可以这样做:

int x = std::stoi(myString.substr(0, 1));
int y = std::stoi(myString.substr(2, 1));
int z = std::stoi(myString.substr(3, 1));