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c++ Programming Glossary: pointedWhat is a smart pointer and when should I use one? http://stackoverflow.com/questions/106508/what-is-a-smart-pointer-and-when-should-i-use-one bare C pointer to manage the lifetime of the object being pointed to. With bare C pointers the programmer has to explicitly destroy..
Sorting a vector of custom objects http://stackoverflow.com/questions/1380463/sorting-a-vector-of-custom-objects vec.end less_than_key Edit As Kirill V. Lyadvinsky pointed out instead of supplying a sort predicate you can override the..
http://stackoverflow.com/questions/1461432/what-is-array-decaying pointers. A C array declared as int numbers 5 cannot be re pointed i.e. you can't say numbers 0x5a5aff23. When you pass an array..
http://stackoverflow.com/questions/162941/why-use-pointers asked prinf to print the content of the memory address pointed to by 'a' plus one in this example above and we wouldn't have..
Is it good practice to NULL a pointer after deleting it? http://stackoverflow.com/questions/1931126/is-it-good-practice-to-null-a-pointer-after-deleting-it Setting pointers to NULL after you've deleted what it pointed to certainly can't hurt but it's often a bit of a band aid over..
What is meant by Resource Acquisition is Initialization (RAII)? http://stackoverflow.com/questions/2321511/what-is-meant-by-resource-acquisition-is-initialization-raii and destroyed with its owner object. Update2 as @sbi pointed out the resource although often is allocated inside the constructor..
Examples of good gotos in C or C++ http://stackoverflow.com/questions/245742/examples-of-good-gotos-in-c-or-c were concerned by the lack of block scope. As @quinmars pointed out in a comment you can always put braces around the loop body...
Read whole ASCII file into C++ std::string http://stackoverflow.com/questions/2602013/read-whole-ascii-file-into-c-stdstring ideas Current Answer Updated on Dec 5 2012 Tyler McHenry pointed out that his initial clever suggestion may be inefficient in..
What does int argc, char *argv[] mean? http://stackoverflow.com/questions/3024197/what-does-int-argc-char-argv-mean to main in C and C . argc will be the number of strings pointed to by argv . This will in practice be 1 plus the number of arguments..
RAII and smart pointers in C++ http://stackoverflow.com/questions/395123/raii-and-smart-pointers-in-c it yourself. Quick edit as some of the comments have pointed out this example isn't perfect for at least two reasons. Firstly..
http://stackoverflow.com/questions/4172722/what-is-the-rule-of-three Since the assignment does not take into account what name pointed to before the assignment sooner or later you will get memory..
How to determine if a string is a number with C++? http://stackoverflow.com/questions/4654636/how-to-determine-if-a-string-is-a-number-with-c find_if s.begin s.end char c return std isdigit c s.end As pointed out in the comments below this only works for positive integers...
Checking if a double (or float) is nan in C++ http://stackoverflow.com/questions/570669/checking-if-a-double-or-float-is-nan-in-c only if f is NaN. Note that as some comments below have pointed out not all compilers respect this when optimizing code. For..
What are the differences between pointer variable and reference variable in C++? http://stackoverflow.com/questions/57483/what-are-the-differences-between-pointer-variable-and-reference-variable-in-c arithmetics but you can take the address of an object pointed by a reference and do pointer arithmetics on it as in obj 5..
Accessing class members on a NULL pointer http://stackoverflow.com/questions/669742/accessing-class-members-on-a-null-pointer never makes reference to any members of the object pointed to by its this argument you effectively dodge the bullet of..
Why do all these crazy function pointer definitions all work? What is really going on? http://stackoverflow.com/questions/6893285/why-do-all-these-crazy-function-pointer-definitions-all-work-what-is-really-goi The unary when applied to a function pointer yields the pointed to function just like it yields the pointed to object when it.. yields the pointed to function just like it yields the pointed to object when it is applied to an ordinary pointer to an object...
Uses for multiple levels of pointer dereferences? http://stackoverflow.com/questions/758673/uses-for-multiple-levels-of-pointer-dereferences improve this question each star should be read as which pointed to by a pointer so char foo is char which pointed to by a pointer.. as which pointed to by a pointer so char foo is char which pointed to by a pointer foo . However char foo is char which pointed.. to by a pointer foo . However char foo is char which pointed to by a pointer which is pointed to a pointer which is pointed..
What is the difference between char a[] = “string”; and char *p = “string”; http://stackoverflow.com/questions/9460260/what-is-the-difference-between-char-a-string-and-char-p-string sizes to the pointer and finally fetch the character pointed to. In the example above both a 3 and p 3 happen to be the character..
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