pointer in c

The function getenv () in C

char * getenv (const char * name) function searches the environment string pointed to by the name parameter and returns the value associated with that string.

the int system (const char * command) function passes the command name or program name specified by the command to the host environment to be executed by the command processor and returned after the command is completed.

The function bsearch () in C

void function * bsearch (const void * key, const void * base, nitems, size, int (* compar) (const void *, const void *)) looks for an array of nitems objects, its original member is point to by base, for a member that connects the object pointed to by the key. the size of each array element is

Function abs () in C

the function int abs (int x) returns the absolute value of integer x.

Div () function in C

div_t div function (int numer, int denom) divides numer numerator for denom.

Labs () function in C

function long int labs (long int x) returns the absolute value of x.

The function rand () in C

the function int rand (void) returns a random number in the range from 0 to rand_max.

Calloc () function in C

the function void * calloc (so-phan-tu, kich-co-phan-tu) allocates the requested memory and returns a pointer to it. the difference between malloc and calloc is: malloc does not set memory to 0 while calloc sets the allocated memory to 0.

Free () function in C

the void free function (void * ptr) frees the previously allocated memory by a call to calloc, malloc, or realloc

Malloc () function in C

the malloc () function allocates the requested memory and returns a pointer to it.

Function realloc () in C

the realloc () function attempts to recover the memory block pointed to by the ptr pointer that was previously allocated with a call to malloc or calloc.

The abort () function in C

the abort () function stops executing the program abnormally.

The exit () function in C

the void exit (int status) function immediately terminates the calling process. any file opened by the process is closed and any child process is inherited by the initial process and the parent process is sent a sigchild signal.

How to use pointer events in JavaScript

javascript has a newer standard called pointer events. it handles both mouse and touch operations, so you don't have to worry about implementing each separately.

Turn off Enhance Pointer Precision feature on Windows computers

what is enhance pointer precision? what is the effect of enhance pointer precision feature? how to turn off enhance pointer precision feature on windows

How to change the mouse pointer on Windows 11 with many styles and colors

windows 11 allows you to change the color and customize the mouse pointer to your liking. the following will be instructions on how to change the mouse pointer on windows 11...

Advice and Pointers to Help You Easily Handle Being in a Car Accident

car accidents can be incredibly traumatic, so much so that they can leave you suffering from a longstanding stress disorder in their wake.

How to Create Pointers in C

pointers are the nightmare of every new c programmer. however, they are also the feature that made c the widespread, powerful programming language it is until today. like many other programming features and constructs, there is a...

Call the function by pointer in C ++

the method of calling a function by pointer in c ++ passes parameters to a function, copying the addresses of a parameter into the official parameter. inside the function, this address is used to access the actual parameter used in the function call. that is, changes made to the official parameter

Arithmetic pointer in C / C ++

as explained in the main chapter, the cursor in c / c ++ is an address, which is a numeric value. therefore, you can perform arithmetic operations on a pointer as you would with numeric values. there are 4 arithmetic operators that can be used on pointers: ++, -, +, and -.