#include <sstream>

// 使用istringstream
std::istringstream iss("some data");

// 使用ostringstream
std::ostringstream oss;

// 使用stringstream
std::stringstream ss;

#include <iostream>

#include <sstream>

int main() {

    std::string data = "10 20.5";

    std::istringstream iss(data);

    int i;

    double d;

    iss >> i >> d;

    std::cout << "Integer: " << i << std::endl;

    std::cout << "Double: " << d << std::endl;

    return 0;

}

Integer: 10
Double: 20.5

#include <iostream>

#include <sstream>

int main() {

    std::ostringstream oss;

    int i = 100;

    double d = 200.5;

    oss << i << " " << d;

    std::string result = oss.str();

    std::cout << "Resulting string: " << result << std::endl;

    return 0;

}

Resulting string: 100 200.5

#include <iostream>

#include <sstream>

int main() {

    std::string data = "30 40.5";

    std::stringstream ss(data);

    int i;

    double d;

    // 从stringstream读取数据

    ss >> i >> d;

    std::cout << "Read Integer: " << i << ", Double: " << d << std::endl;

    // 向stringstream写入数据

    ss.str(""); // 清空stringstream

    ss << "New data: " << 50 << " " << 60.7;

    std::string newData = ss.str();

    std::cout << "New data string: " << newData << std::endl;

    return 0;

}

Read Integer: 30, Double: 40.5
New data string: New data: 50 60.7