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在C++中，可以使用string和stringstream来处理字符串。
- 使用
string类来创建和操作字符串：
#include <iostream> #include <string> int main() { std::string str = "Hello, World!"; // 获取字符串长度 std::cout << "Length: " << str.length() << std::endl; // 获取子字符串 std::string subStr = str.substr(0, 5); std::cout << "Substring: " << subStr << std::endl; // 连接字符串 std::string concatStr = str + " Welcome!"; std::cout << "Concatenated string: " << concatStr << std::endl; // 查找字符串 std::size_t found = str.find("World"); if (found != std::string::npos) { std::cout << "Found at index: " << found << std::endl; } else { std::cout << "Not found" << std::endl; } return 0; } - 使用
stringstream类来处理字符串流：
#include <iostream> #include <sstream> int main() { std::string str = "42 3.14 Hello"; std::istringstream iss(str); // 从字符串创建输入流 int num; float fNum; std::string word; // 从流中提取数据 iss >> num >> fNum >> word; std::cout << "Number: " << num << std::endl; std::cout << "Float Number: " << fNum << std::endl; std::cout << "Word: " << word << std::endl; std::ostringstream oss; // 创建输出流 oss << "Concatenated: " << num << " " << fNum << " " << word; std::cout << oss.str() << std::endl; // 输出流中的字符串 return 0; } 这是一些简单的示例，string和stringstream类还有更多的功能和用法，可以根据具体需求查阅C++文档来了解更多信息。
