我在ILIF和C++中继续遇到问题

问：每次我运行程序并输入“你是谁”时，都会显示a的错误值与发生的情况不匹配？是的，我是C++的NOOB 代码：

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流和字符串的运算符>>输入由空格分隔的单词。您应该使用一种功能，可以一次读取多个单词，直到按下Enter键为止。例如，您可以使用标准函数std:：getline

还需要包括标题

给你

#include <iostream>
#include <string>

int main() 
{
    std::string s;

    if ( std::getline( std::cin, s ) )
    {
        // check the boolean condition
        if ( s == "hello" ) 
        {
            // if condition is true then print the following
            std::cout << "hi" << std::endl;
        } 
        else if ( s == "who are you" ) 
        {
            // if else if condition is true
            std::cout << "a better question is who are you?" << std::endl;
        } 
        else if ( s == "what am i doing" ) 
        {
            // if else if condition is true
            std::cout << "reading this output  " << std::endl;
        }
        else 
        {
            // if none of the conditions is true
            std::cout << "Error Value of a is not matching" << std::endl;
        }
    }

    return 0;
}

---

cin>>a只能读一个单词。它怎么能等于你是谁？使用std:：getLine读取字符串如果你尝试打印一个字符串，你会立即看到问题。

#include <iostream>
#include <string>

int main() 
{
    std::string s;

    if ( std::getline( std::cin, s ) )
    {
        // check the boolean condition
        if ( s == "hello" ) 
        {
            // if condition is true then print the following
            std::cout << "hi" << std::endl;
        } 
        else if ( s == "who are you" ) 
        {
            // if else if condition is true
            std::cout << "a better question is who are you?" << std::endl;
        } 
        else if ( s == "what am i doing" ) 
        {
            // if else if condition is true
            std::cout << "reading this output  " << std::endl;
        }
        else 
        {
            // if none of the conditions is true
            std::cout << "Error Value of a is not matching" << std::endl;
        }
    }

    return 0;
}