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How do I convert a double into a string in C++?
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The boost (tm) way:
std::string str = boost::lexical_cast<std::string>(dbl);
The Standard C++ way:
std::ostringstream strs;
strs << dbl;
std::string str = strs.str();
Note: Don't forget #include <sstream>
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How to cast/convert pointer to reference in C++
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Call it like this:
foo(*ob);
Note that there is no casting going on here, as suggested in your question title. All we have done is de-referenced the pointer to the object which we then pass to the function.
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Converting stream of int's to char's in java
...et, or use InputStreamReader with the appropriate Charset instead.
Simply casting from int to char only works if you want ISO-8859-1, if you're reading bytes from a stream directly.
EDIT: If you are already using a Reader, then casting the return value of read() to char is the right way to go (aft...
Return Boolean Value on SQL Select Statement
...N EXISTS (
SELECT *
FROM [User]
WHERE UserID = 20070022
)
THEN CAST(1 AS BIT)
ELSE CAST(0 AS BIT) END
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30岁之后，程序员该向什么方向发展？ - 杂谈 - 清泛网 - 专注C/C++及内核技术
...ools，用得人比较少。有一次我在Github上找到一个mootools的插件，很久没维护了。但是使用过程中发现一些问题，反复测试确认后，怀着忐忑的心情，我向原地址提交了commit，没想到他很快就合并了，并且向我表示感谢。当时的心...
Converting an int to std::string
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boost::lexical_cast<std::string>(yourint) from boost/lexical_cast.hpp
Work's for everything with std::ostream support, but is not as fast as, for example, itoa
It even appears to be faster than stringstream or scanf:
http://www....
Convert text into number in MySQL query
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Simply use CAST,
CAST(column_name AS UNSIGNED)
The type for the cast result can be one of the following values:
BINARY[(N)]
CHAR[(N)]
DATE
DATETIME
DECIMAL[(M[,D])]
SIGNED [INTEGER]
TIME
UNSIGNED [INTEGER]
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How do I get around type erasure on Scala? Or, why can't I get the type parameter of my collections?
...les above, doesn't the unchecked part in front of the guard condition do a cast? Wouldn't you get a class cast exception when going through the matches on the first object that cant' be cast to a string?
– Toby
Aug 28 '15 at 10:32
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What is uintptr_t data type
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Another common use case of casting a pointer to an int is to create an opaque handle that hides the pointer. This is useful for returning a reference to an object from APIs where you want to keep the object private to the library and prevent applicati...
How do I specify a pointer to an overloaded function?
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You can use static_cast<>() to specify which f to use according to the function signature implied by the function pointer type:
// Uses the void f(char c); overload
std::for_each(s.begin(), s.end(), static_cast<void (*)(char)>(&...