Server Side Programming Articles - Page 2384 of 2650

In C++, both delete and free() are used to deallocate the dynamically created memory. In this article, we will learn about the delete operator and free() function with the help of examples. C++ delete Operator The delete operator is used to deallocate the memory. User has privilege to deallocate the created pointer variable by this delete operator. Syntax Here is the syntax of delete operator in C++ language: delete pointer_variable; Here is the syntax to delete the block of allocated memory: delete[ ] pointer_variable; Example Following is the example of delete operator to see its usage in memory ... Read More

fgets()The function fgets() is used to read the string till the new line character. It checks array bound and it is safe too.Here is the syntax of fgets() in C language, char *fgets(char *string, int value, FILE *stream)Here, string − This is a pointer to the array of char.value − The number of characters to be read.stream − This is a pointer to a file object.Here is an example of fgets() in C language, Example Live Demo#include #define FUNC 8 int main() {    char b[FUNC];    fgets(b, FUNC, stdin);    printf("The string is: %s", b);    return 0; }OutputThe ... Read More

The return value of main() function shows how the program exited. The normal exit of program is represented by zero return value. If the code has errors, fault etc., it will be terminated by non-zero value.In C++ language, the main() function can be left without return value. By default, it will return zero.Here is the syntax of main() function in C language, int main() {    ….    return 0; }Here is an example of main() function in C language, Example Live Demo#include int main() {    int a = 10;    char b = 'S';    float c = ... Read More

The datatype size_t is unsigned integral type. It represents the size of any object in bytes and returned by sizeof operator. It is used for array indexing and counting. It can never be negative. The return type of strcspn, strlen functions is size_t.Here is the syntax of size_t in C language, const size_t var_name;Here, var_name − This the name of variable.Here is an example of size_t in C language, Example Live Demo#include #include #include int main(void) {    const size_t x = 150;    int a[x];    for (size_t i = 0;i < x; ++i)    a[i] = ... Read More

There are so many C++ code formatter or beautifier tools which beautifies your code or format with proper indentation. The C++ code formatter/ beautifier are listed as follows − C++ Code Formatter/Beautifier Description Astyle This is a source code formatter. It can be used for C++, java and other languages. It’s latest version is 2.03 and it released in April 2013. Clang-Format It is a command line tool along with clang compiler. It is open- source tool and programmed in C++, python. The latest version is 3.3. Universal Indent GUI It ... Read More

The function modf() is used to split the passed argument in integer and fraction. It is declared in “math.h” header file for the mathematical calculations. It returns the fractional value of passed argument.Here is the syntax of modf() in C language, double modf(double value, double *integral_pointer);Here, value − The value which splits into integer and fraction.integral_pointer − It points the integer part of argument after splitting.Here is an example of modf() in C language, Example Live Demo#include #include int main () {    double val, x, res;    val = 28.856;    res = modf(val, &x);    printf("Integral part of val ... Read More

The function isgreater() is used to check that the first argument is greater than the second one or not. It is declared in “math.h” header file in C language. It returns true, if successful, otherwise false.Here is the syntax of isgreater().bool isgreater(value1 , value2);Here, value1 − This is the first argument which will be checked with value2.value2 − This is the second argument which is used to check value1 that is greater or not.Here is an example of isgreater().Example Live Demo#include #include using namespace std; int main() {    int val1 = 28;    int val2 = 8;    bool result; ... Read More

Increment operators are used to increase the value by one while decrement works opposite. Decrement operator decrease the value by one.Pre-increment (++i) − Before assigning the value to a variable, the value is incremented by one.Post-increment (i++) − After assigning the value to a variable, the value is incremented.Here is the syntax of i++ and ++i in C++ language,++variable_name; // Pre-increment variable_name++; // Post-incrementHere,variable_name −Name of the variable given by user.Here is an example of pre and post increment in C++ language,Example Live Demo#include using namespace std; int main() {    int i = 5;    cout

To get the UNIX syslog library information, we need to use the syslog module into our programs. This module has syslog has different modules for the syslog library. To use this module, we should import it using − import syslog The methods are like below − Method syslog.syslog(message) or syslog.syslog(priority, message) This method is used to send a string type message to the system logger. Each message has a priority. The priority argument can be used to set the priority of the given message. Method syslog.openlog([ident[, logoption[, facility]]]) This method is used to logging options of subsequent syslog ... Read More

To measure the UNIX resource usage, we need to use the resource module into our programs. This module also can control the resource utilization. To use this module, we should import it using − import resource Resource Limits In this module we can use the setrlimit() to limit the resource utilization. There are two parameters to limit the resources. These parameters are soft limit and the hard limit. The soft limit is basically the current limit, it can be changed over process, but it cannot exceed the hard limit. The hard limit can be reduced to any value ... Read More