如何在C++中将字符串转换为整数？

template <class StrType>
StrType stoi(StrType str);

#include <iostream>
#include <string>

int main() {
    std::string str = "12345";
    int num = stoi(str);
    std::cout << "The converted number is: " << num << std::endl;
    return 0;
}

#include <iostream>
#include <string>
#include <sstream>

int main() {
    std::string str = "12345";
    std::istringstream iss(str);
    int num;
    iss >> num;
    std::cout << "The converted number is: " << num << std::endl;
    return 0;
}