eduguru 
C Program to Display the current Date and Time #include<stdio.h> #include<time.h> int main() { printf(“\n\n\t\t C Program to display date time\n\n\n”); time_t t; // not a primitive datatype time(&t); printf(“\nThis program has been writeen at (date and time): %s”, ctime(&t)); return 0; }
Basic Call Flow – SIP Key terms used in SIP: It is important to familiarize with these terms in order to understand basic SIP call flow. Here are few of them: Call flow: It’s a flow diagram of SIP messages — shows an ideal way how a media session carried over two endpoints. Its a … Read more
SIP : Session Initiation Protocol Session Initiation Protocol (SIP) is one of the most common protocols used in VoIP technology. It is an application layer protocol that works in conjunction with other application layer protocols to control multimedia communication sessions over the Internet. SIP Endpoint Communication What is VoIP Technology Before moving further, let us … Read more
SIP – Headers A header is a component of a SIP message that conveys information about the message. It is structured as a sequence of header fields. SIP header fields in most cases follow the same rules as HTTP header fields. Header fields are defined as Header: field, where Header is used to represent the header … Read more
C program to Change the Text Background Color Few important points regarding this program are: SetConsoleTextAttribute: Sets the attributes of characters written to the console screen buffer by the WriteFile or WriteConsole function, or echoed by the ReadFile or ReadConsole function. This function affects text written after the function call. Syntax: BOOL WINAPI SetConsoleTextAttribute(_In_ HANDLE hConsoleOutput , _In_ WORD wAttributes); Below is the … Read more
C Program to create a Menu Driven software using Switch Case #include<stdio.h> int main() { printf(“\n\n\t\tMenu driven program in c\n\n\n”); int choice, num, i; unsigned long int fact; while(1) { printf(“1. Factorial \n”); printf(“2. Prime\n”); printf(“3. Odd\\Even\n”); printf(“4. Exit\n\n\n”); printf(“Enter your choice : “); scanf(“%d”,&choice); switch(choice) { case 1: printf(“Enter number:\n”); scanf(“%d”, &num); fact = … Read more
C Program to Shutdown Linux OS In this program : You need to be logged in as user for above program to execute otherwise you will get the message shutdown: “Need to be root”. ‘-P’ option specifies you want to power off your machine. You can specify minutes as: shutdown -P “number of minutes” Let see the below program #include<stdio.h> #include<stdlib.h> … Read more
C Program to shutdown Windows 7 This program turns off i.e shutdown your computer system. System function of stdlib.h is used to run an executable file shutdown.exe which is present in C:\WINDOWS\system32 folder in Windows 7 and XP #include<stdio.h> #include<stdlib.h> // to use system() method int main() { printf(“\n\n\t\tEduguru Shutdown program in c\n\n\n”); char ch; printf(“Do you want to … Read more
Basic Program of Pointer #include <stdio.h> int main() { printf(“\n\n\t\tEduguru – Pointer program\n\n\n”); int var = 24; // actual variable declaration int *p; p = &var; // storing address of int variable var in pointer p printf(“\n\nAddress of var variable is: %x \n\n”, &var); // address stored in pointer variable printf(“\n\nAddress stored in pointer variable … Read more
The First Windows Program in C To keep things simple we would begin with a program that merely displays a “Hello” message in a message box. Here is the program… #include <windows.h> int _stdcall WinMain ( HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpszCmdline, int nCmdShow ) { MessageBox ( 0, “Hello!”, “Title”, 0 ) ; return … Read more