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What is the difference between a definition and a declaration?
...an be declared as often as you want. Thus, the following is legal in C and C++:
double f(int, double);
double f(int, double);
extern double f(int, double); // the same as the two above
extern double f(int, double);
However, it must be defined exactly once. If you forget to define something that'...
C++ compiling on Windows and Linux: ifdef switch [duplicate]
I want to run some c++ code on Linux and Windows. There are some pieces of code that I want to include only for one operating system and not the other. Is there a standard #ifdef that once can use?
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Is Java really slow?
...re memory access, and some operations are more complex than with ASCII (C, C++). At the time, it was the right decision for portability, but it carries a small performance cost. UTF-8 looks like a better choice now.
Array access is a bit slower compared to C, due to bounds checks. The penalty used t...
Remove last character from C++ string
How can I remove last character from a C++ string?
10 Answers
10
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How to make a SIMPLE C++ Makefile
...rce files
Implicit and Pattern Rules
We would generally expect that all C++ source files should be treated the same way, and Make provides three ways to state this:
suffix rules (considered obsolete in GNU make, but kept for backwards compatibility)
implicit rules
pattern rules
Implicit rules...
What are POD types in C++?
...nto a bit more detail and defines it as:
A Plain Old Data Structure in C++ is an aggregate class that contains only PODS as members, has no user-defined destructor, no user-defined copy assignment operator, and no nonstatic members of pointer-to-member type.
Greater detail can be found in this...
Accessing an array out of bounds gives no error, why?
I am assigning values in a C++ program out of the bounds like this:
17 Answers
17
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What’s the best way to check if a file exists in C++? (cross platform)
...rm) , but I'm wondering if there is a better way to do this using standard c++ libs? Preferably without trying to open the file at all.
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Does the C++ standard mandate poor performance for iostreams, or am I just dealing with a poor imple
Every time I mention slow performance of C++ standard library iostreams, I get met with a wave of disbelief. Yet I have profiler results showing large amounts of time spent in iostream library code (full compiler optimizations), and switching from iostreams to OS-specific I/O APIs and custom buffer...
What does `m_` variable prefix mean?
...ny variable type; can't do that with "this->"). Part of me wishes that C++ would just standardize on making "this->" mandatory. But that's going more into the world of discussion than being an answer.
– mh01
Oct 22 '12 at 2:00
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