如何在 C++ 中将字符串值分配给字符串变量
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How to assign a string value to a string variable in C++
提问by neuromancer
Shouldn't this work?
这不应该工作吗？
string s;
s = "some string";
回答by sbi
Shouldn't this work?
string s; s = "some string";
这不应该工作吗？
string s; s = "some string";
Well, actually it's spelled std::string, but if you have a using namespace std;(absolutely evil) or using std::string;(somewhat less evil) before that, it should work - provided that you also have a #include <string>at the top of your file.
好吧，实际上它是拼写的std::string，但是如果您在此之前有using namespace std;（绝对邪恶）或using std::string;（邪恶程度稍低），它应该可以工作 - 前提是您#include <string>的文件顶部也有一个。
Note, however, that it is wasteful to first initialize sto be an empty string, just to replace that value in the very next statement. (And if efficiency wasn't your concern, why would you program in C++?) Better would be to initialize sto the right value immediately:
但是请注意，首先初始化s为空字符串是浪费的，只是为了在下一个语句中替换该值。（如果您不关心效率，为什么要用 C++ 编程？）最好s立即初始化为正确的值：
std::string s = "some string"
or
或者
std::string s("some string");
回答by Stephen
Yes!
是的！
It's default constructing a string, then assigning it from a const char*.
默认构造一个字符串，然后从const char*.
(Why did you post this question?... did you at least try it?)
（你为什么发布这个问题？...你至少尝试过吗？）
回答by Sabyasachi Behera
use header file string.h or bits/stdc++.h then try s.assign("some string");
使用头文件 string.h 或 bits/stdc++.h 然后尝试 s.assign("some string");
