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深入浅出计算机字符集编码 - C/C++ - 清泛网 - 专注C/C++及内核技术
....getByte(“UTF-8”), “EUC-JP”)就可以进行编码的转换，不过C++就没那么幸运了，除非按照一定的逻辑自行实现一套编码转换的方法，当然从各方面限制来看是不太现实的。
因此，要解决此问题，需对字符集编码的原理一探究竟...
Java Annotations
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Also, are they unique to Java, is there a C++ equivalent?
No, but VB and C# have attributes which are the same thing.
Their use is quite diverse. One typical Java example, @Override has no effect on the code but it can be used by the compiler to generate a warning...
How to define a preprocessor symbol in Xcode
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For Xcode 9.4.1 and C++ project. Adding const char* Preprocessor Macros to both Debug and Release builds.
Select your project
Select Build Settings
Search "Preprocessor Macros"
Open interactive list
Add your macros and don't forget to...
Is there any performance reason to declare method parameters final in Java?
...e type, such as int, and inline them directly in the code just like with a C++ macro.
However, i have no clue if this is done in practice, but it could be done in order to save some memory.
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How to check if a file is empty in Bash?
... the shell cannot help you when you misspell, whereas a compiler like your C++ compiler can help you.
Notice incidentally that I have swapped the roles of empty.txt and full.txt, as @Matthias suggests.
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How to map atan2() to degrees 0-360
...(theta_rad/M_PI*180) + (theta_rad > 0 ? 0 : 360);
This should work in C++: (depending on how fmod is implemented, it may be faster or slower than the conditional expression)
theta_deg = fmod(atan2(y,x)/M_PI*180,360);
Alternatively you could do this:
theta_deg = atan2(-y,-x)/M_PI*180 + 180;
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Why is there no Tree class in .NET?
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@Veverke Perhaps you were thinking of C++ templates. .NET generics are runtime types.
– Tom Blodget
Sep 29 '16 at 12:46
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Deleting an object in java?
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Your C++ is showing.
There is no delete in java, and all objects are created on the heap. The JVM has a garbage collector that relies on reference counts.
Once there are no more references to an object, it becomes available for ...
“f” after number
...ter that this is a floating point number (I assume you are talking about c/c++ here). If there is no f after the number, it is considered a double or an integer (depending on if there is a decimal or not).
3.0f -> float
3.0 -> double
3 -> integer
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Using the “start” command with parameters passed to the started program
...lt;parameters>
I'm not sure this actually waits for completion... the C++ Redistributable I was installing went fast enough that it didn't matter
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