C++ 从 1 个字符转换为字符串？
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时间：2020-08-27 20:59:55 来源:igfitidea点击:
C++ convert from 1 char to string?
提问by weeo
I need to cast only 1 charto string. The opposite way is pretty simple like str[0].
我只需要将 1 投射char到string. 相反的方式很简单，就像str[0].
The following did not work for me:
以下对我不起作用：
char c = 34;
string(1,c);
//this doesn't work, the string is always empty.
string s(c);
//also doesn't work.
boost::lexical_cast<string>((int)c);
//also doesn't work.
回答by Massa
All of
所有的
std::string s(1, c); std::cout << s << std::endl;
and
和
std::cout << std::string(1, c) << std::endl;
and
和
std::string s; s.push_back(c); std::cout << s << std::endl;
worked for me.
为我工作。
回答by Mallen
I honestly thought that the casting method would work fine. Since it doesn't you can try stringstream. An example is below:
老实说，我认为铸造方法可以正常工作。既然没有，你可以试试stringstream。一个例子如下：
#include <sstream>
#include <string>
std::stringstream ss;
std::string target;
char mychar = 'a';
ss << mychar;
ss >> target;
