First of all, never blindly assume that one method is always going to be faster than the other; code up both versions and measure their relative performance.
Once you've made that measurement,...
Type: Posts; User: jbode; Keyword(s):
First of all, never blindly assume that one method is always going to be faster than the other; code up both versions and measure their relative performance.
Once you've made that measurement,...
The null pointer is a well-defined "nowhere" that is guaranteed to compare unequal to any valid memory address. It can be used in several different ways:
Indicate an error condition - standard...
There is a difference between function overloading and function overriding.
You can overload a function or method by declaring or defining multiple functions or methods with the same name in the...
You might find this to be an interesting read.
Giving it a quick scan, I'm not sure if Ritchie says so explicitly, but the first C compiler was either written in PDP assembler or B.
Contrary to the answers you've gotten so far, you do not want to use fflush to clear an input stream. From the C Language Standard:
Emphasis mine. Calling fflush on an input stream may clear...
I know this thread is over 5 years old now, but I figured I'd go ahead and post an example.
This program goes a bit above and beyond the initial request in that it scans for all C keywords, rather...
The standard libraries are as much a part of the C language as the grammar. Note that there are two types of execution environments, hosted and freestanding. A hosted environment is what most of us...
The terms method, function, procedure, subroutine, and subprogram are all roughly synonymous, although the term function is generally reserved for a subroutine that returns a value. Some languages...
Depending on the kinds of applications you want to write, C has a number of disadvantages:
Weak text processing capabilities - C's string library is extremely primitive (it doesn't even define...
Memory allocated by individual malloc() calls should be contiguous. That doesn't hold for multiple calls, though. For example, given the code
char *p = malloc(10);
char *q = malloc(20);
...
Your handy C reference manual should list all of the library functions for each header; if it doesn't, get a better one (I use "C: A Reference Manual" by Samuel Harbison & Guy Steele, currently 5th...
You don't have to use the sizeof operator in the malloc() call, especially if you're just allocating arrays of char (sizeof (char) == 1 by definition). However, if you're allocating arrays of types...
What language, and what are you trying to swap?
In C++ it's easy:
template <typename T>
void swap(T& a, T& b)
{
T tmp = a;