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C and C++ Cheat Sheet

on December 03, 2016

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What is the difference between C and C++ programming languages ?

Let’s consider the following C++ program which prints “Hello World” on to the console or terminal window. We will look at various elements used in the program. 1 //C++ program to print “Hello World” 2 #include <iostream> 3 using namespace std; 4 int main() 5 { 6 cout<<“Hello World”; 7 return 0; 8 } Output of the above code is : 1 Hello World In the above program, iostream is the name of a header file which contains I/O functionality. In order to take input and print some output using our C++ program, we have to include that header file using #include directive. Note that writing “.h” at the end of the header file name results in an error. Such style is deprecated in newer versions of C++. The cin and cout elements are declared in std namespace inside iostream header file. So, to use either cin or cout , we have to write using namespace <name> . If you don’t want to write this line, you have

What Is The Difference Between LAN, WAN, MAN, CAN, VPN, BAN, NAN, SAN ?

Short : A computer network is an interconnection of various devices like laptops, routers, switches, servers, etc. with the help of wired or wireless means. We can differentiate these networks by their reach, i.e., geographical area. For example, we have local area network, wide area network, personal area network, metropolitan area network, near-me network, etc. Whatever connection you use, whether your home WiFi or the office Ethernet, you’re a part of some computer network. A computer network can include devices like routers, hubs, switches, end-user devices, repeaters, network cards, etc. These devices can be arranged in various network topologies as per the requirement. We can classify a computer network into different types depending on its size and the geographical area it covers. The most common types of computer networks are LAN, MAN, WAN, PAN, etc. What is a Local Area Network (LAN)? LAN is a form of a computer network most known to the general public. It has a limit

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C and C++ Cheat Sheet

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