c++转换/添加字符到字符串

I'm about to hit the screen with my keyboard as I couldn't convert a char to a string, or simply adding a char to a string.

我正要用键盘敲击屏幕，因为我不能将字符转换为字符串，或者只是将字符添加到字符串中。

I have an char array and I want to pick whichever chars I choose in the array to create a string. How do I do that?

我有一个char数组，我想在数组中选择任意一个chars来创建一个字符串。我该怎么做呢?

string test = "oh my F**king GOD!"
const char* charArray = test.c_str();

string myWord = charArray[0] + charArray[4];

thats how far I got with it. Please help.

这就是我用它走了多远。请帮助。

4 个解决方案

#1

no need to convert to c_str just:

无需转换为c_str:

string test = "oh my F**king GOD!";
string myWord;
myWord += test[0];
myWord += test[4];

#2

string myWord;
myWord.push_back(test[0]);
myWord.push_back(test[4]);

You don't need to use c_str() here.

这里不需要使用c_str()。

#3

Are you restricted in some way to use C++ functions only? Because, for this purpose I use the old C functions like sprintf

您是否在某些方面受到限制，只能使用c++函数?因为，为了这个目的，我使用了像sprintf这样的老C函数

#4

You need to also need to remember that a C++ string is quite similar to a vector, while a C string is just array of chars. Vectors have an operator[] and a push_back method. Read more here You use push_back and do not convert to c string. So your code would look like this:

您还需要记住，c++字符串与向量非常相似，而C字符串只是chars的数组。向量有一个运算符[]和一个push_back方法。在这里阅读更多内容，使用push_back，不要转换为c字符串。你的代码是这样的:

string test = "oh my F**king GOD!"
string myWord;
myWord.push_back(test[0]);
myWord.push_back(test[4]);

#1