𝐊𝐧𝐨𝐰𝐥𝐞𝐝𝐠𝐞 𝐬𝐡𝐚𝐫𝐞𝐝 𝐢𝐬 𝐤𝐧𝐨𝐰𝐥𝐞𝐝𝐠𝐞 𝐬𝐪𝐮𝐚𝐫𝐞𝐝! | Shalu Anand

𝐊𝐧𝐨𝐰𝐥𝐞𝐝𝐠𝐞 𝐬𝐡𝐚𝐫𝐞𝐝 𝐢𝐬 𝐤𝐧𝐨𝐰𝐥𝐞𝐝𝐠𝐞 𝐬𝐪𝐮𝐚𝐫𝐞𝐝!

with this ,

𝗟𝗲𝘁'𝘀 𝗕𝗲𝗴𝗶𝗻 𝐰𝐢𝐭𝐡 𝐃𝐚𝐲 2:

𝚜𝚎𝚛𝚒𝚎𝚜 𝚘𝚏 𝚜𝚑𝚊𝚛𝚒𝚗𝚐 𝚖𝚢 𝚔𝚗𝚘𝚠𝚕𝚎𝚍𝚐𝚎 𝚘𝚏 𝚝𝚑𝚎 𝙲 𝙻𝚊𝚗𝚐𝚞𝚊𝚐𝚎.

➡️𝐄𝐝𝐢𝐭𝐢𝐧𝐠 𝐭𝐡𝐞 𝐩𝐫𝐨𝐠𝐫𝐚𝐦

Simple text editors include vim or gedit on Linux, or Notepad on Windows. Cross-platform editors also include

Visual Studio Code or Sublime Text.

The editor must create plain text files, not RTF or other any other format.

➡️𝐂𝐨𝐦𝐩𝐢𝐥𝐢𝐧𝐠 𝐚𝐧𝐝 𝐫𝐮𝐧𝐧𝐢𝐧𝐠 𝐭𝐡𝐞 𝐩𝐫𝐨𝐠𝐫𝐚𝐦

To run the program, this source file (hello.c) first needs to be compiled into an executable file (e.g. hello on Unix/Linux system or hello.exe on Windows). This is done using a compiler for the C language.

See more about compiling

➡️𝐂𝐨𝐦𝐩𝐢𝐥𝐞 𝐮𝐬𝐢𝐧𝐠 𝐆𝐂𝐂

GCC (GNU Compiler Collection) is a widely used C compiler. To use it, open a terminal, use the command line to

navigate to the source file's location and then run:

gcc hello.c -o hello

If no errors are found in the source code (hello.c), the compiler will create a binary file, the name of which is

given by the argument to the -o command line option (hello). This is the final executable file.

We can also use the warning options -Wall -Wextra -Werror, which help to identify problems that can cause the

program to fail or produce unexpected results. They are not necessary for this simple program but this is way of adding them:

gcc -Wall -Wextra -Werror -o hello hello.c

➡️𝐔𝐬𝐢𝐧𝐠 𝐭𝐡𝐞 𝐜𝐥𝐚𝐧𝐠 𝐜𝐨𝐦𝐩𝐢𝐥𝐞𝐫

To compile the program using clang you can use the:

clang -Wall -Wextra -Werror -o hello hello.c

By design, the clang command line options are similar to those of GCC.

➡️𝐔𝐬𝐢𝐧𝐠 𝐭𝐡𝐞 𝐌𝐢𝐜𝐫𝐨𝐬𝐨𝐟𝐭 𝐂 𝐜𝐨𝐦𝐩𝐢𝐥𝐞𝐫 𝐟𝐫𝐨𝐦 𝐭𝐡𝐞 𝐜𝐨𝐦𝐦𝐚𝐧𝐝 𝐥𝐢𝐧𝐞

If using the Microsoft cl.exe compiler on a Windows system that supports Visual Studio and if all environment variables are set, this C example may be compiled using the following command

which will produce an executable hello.exe within the directory the command is executed in (There are warning options such as /W3 for cl, roughly analogous to -Wall, etc for GCC or clang).

cl hello.c

➡️𝐄𝐱𝐞𝐜𝐮𝐭𝐢𝐧𝐠 𝐭𝐡𝐞 𝐩𝐫𝐨𝐠𝐫𝐚𝐦

Once compiled, the binary file may then be executed by typing ./hello in the terminal. Upon execution, the compiled program will print Hello, World, followed by a newline, to the command prompt.

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