如何在c++中将对象类型string的数组数据转换为整型

#include <iostream>
#include <string>

int main() {
    std::string arr[] = {"10", "20", "30"};
    int size = sizeof(arr) / sizeof(arr[0]);
    
    for (int i = 0; i < size; i++) {
        int num = std::stoi(arr[i]);
        std::cout << "Converted integer: " << num << std::endl;
    }
    
    return 0;
}

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

int main() {
    std::string arr[] = {"10", "20", "30"};
    int size = sizeof(arr) / sizeof(arr[0]);
    
    for (int i = 0; i < size; i++) {
        std::stringstream ss(arr[i]);
        int num;
        ss >> num;
        std::cout << "Converted integer: " << num << std::endl;
    }
    
    return 0;
}