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        如何读写 STL C++ 字符串?

        How to read and write a STL C++ string?(如何读写 STL C++ 字符串?)

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                • 本文介绍了如何读写 STL C++ 字符串?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着跟版网的小编来一起学习吧!

                  问题描述

                  #include<string>
                  ...
                  string in;
                  
                  //How do I store a string from stdin to in?
                  //
                  //gets(in) - 16 cannot convert `std::string' to `char*' for argument `1' to 
                  //char* gets (char*)' 
                  //
                  //scanf("%s",in) also gives some weird error
                  

                  同样,如何将 in 写出到标准输出或文件中??

                  Similarly, how do I write out in to stdout or to a file??

                  推荐答案

                  您正在尝试将 C 样式 I/O 与 C++ 类型混合.使用 C++ 时,您应该使用 std::cinstd::cout 流进行控制台输入和输出.

                  You are trying to mix C style I/O with C++ types. When using C++ you should use the std::cin and std::cout streams for console input and output.

                  #include <string>
                  #include <iostream>
                  ...
                  std::string in;
                  std::string out("hello world");
                  
                  std::cin >> in;
                  std::cout << out;
                  

                  但是当读取字符串时,std::cin 一旦遇到空格或新行就会停止读取.您可能希望使用 getline 从控制台获取整行输入.

                  But when reading a string std::cin stops reading as soon as it encounters a space or new line. You may want to use getline to get a entire line of input from the console.

                  std::getline(std::cin, in);
                  

                  您对文件使用相同的方法(处理非二进制数据时).

                  You use the same methods with a file (when dealing with non binary data).

                  std::ofstream ofs("myfile.txt");
                  
                  ofs << myString;
                  

                  这篇关于如何读写 STL C++ 字符串?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持跟版网!

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