{"id":54964,"date":"2019-04-23T15:26:44","date_gmt":"2019-04-23T09:56:44","guid":{"rendered":"https:\/\/data-flair.training\/blogs\/?p=54964"},"modified":"2019-07-03T17:38:56","modified_gmt":"2019-07-03T12:08:56","slug":"basic-structure-of-c-program","status":"publish","type":"post","link":"https:\/\/data-flair.training\/blogs\/basic-structure-of-c-program\/","title":{"rendered":"Learn the Basic Structure of C Program in 7 Mins"},"content":{"rendered":"

Programming in C is a difficult task for someone who is completely oblivious to the basic structure of a C program. After completing this tutorial, you would learn how the Structure of C Program looks like and soon you would be comfortable writing your own programs with ease!<\/p>\n

So, what are you waiting for? Let’s start the Basic Structure of the C program.<\/p>\n

\"Structure<\/a><\/p>\n

Anatomy of a C Program<\/h2>\n

C language has a bundle of protocols that define its programming activities.<\/p>\n

The C programming language came into existence when its developers were working on the development of the Unix operating system using the B language, out of which C evolved. The B language lacked certain features that led to the introduction of C<\/a>.<\/strong><\/em> These features constituted the part of the C program upon which it was is built.<\/p>\n

Parts of C program-<\/h4>\n
    \n
  1. # include <stdio.h> –\u00a0<\/strong>This command is a preprocessor directive\u00a0in C<\/a><\/strong><\/em>\u00a0that includes all standard input-output files before compiling any C program so as to make use of all those functions in our C program.<\/li>\n
  2. \u00a0int main() –<\/strong> This is the line from where the execution of the program starts<\/em>. The main() function starts the execution of any C program.<\/li>\n
  3. { (Opening bracket) –<\/strong> This indicates the beginning of any function<\/em> in the program (Here it indicates the beginning of the main function).<\/li>\n
  4. \/* some comments *\/ –\u00a0<\/strong>Whatever is inside \/*——-*\/ are not compiled and executed<\/em>; they are only written for user understanding or for making the program interactive by inserting a comment line.\u00a0These are known as multiline comments. Single line comments are represented with the help of 2 forward slashes \u201c\/\/\u2014\u2014\u201d.<\/li>\n
  5. printf(\u201cHello World\u201d) –<\/strong>The printf() command is included in the C stdio.h library, which helps to display the message on the output screen<\/em>.<\/li>\n
  6. getch() –\u00a0<\/strong>This command helps to hold the screen<\/em>.<\/li>\n
  7. return 0 –<\/strong>This command terminates the C program and returns a null value, that is, 0.<\/li>\n
  8. } (Closing brackets)-\u00a0<\/strong> This indicates the end of the function<\/em>.\u00a0(Here it indicates the end of the main function)<\/li>\n<\/ol>\n

    Before we move towards an example, you should revise the Syntax of C<\/a>.<\/strong><\/em><\/p>\n

    Example of C Program Structure<\/h2>\n

    The \u201cHello World!\u201d example is the most popular and basic program that will help you get started with programming. This program helps you display the output \u201cHello World\u201d on the output screen.<\/p>\n

    With the help of this example, we can easily understand the basic structure of a C program.<\/p>\n

    #include <stdio.h>\r\nint main()\r\n{\r\n\/\/ Our first basic program in C \r\nprintf(\"Hello World!\\n\\n\");\r\nreturn 0;\r\n}<\/pre>\n
    Code on Screen-<\/strong><\/p>\n
    \"Example<\/a><\/p>\n
    Output-\u00a0<\/strong><\/p>\n
    \"Output<\/a><\/p>\n
    You can practice the code explained above and compile it on your machine to get an essence of C programming.<\/p>\n
    Key takeaway:<\/strong> \\n is used to move the cursor to the new line.<\/p>\n
    Steps involved to get the desired output<\/h3>\n
    Well, when you run a C program and get the output on your screen, there is a series of steps that come in the way. To get the desired output, you need to follow all the steps. These are the steps involved while writing a program in C.<\/p>\n
      \n
    1. Create<\/li>\n
    2. Compile<\/li>\n
    3. Execute or run<\/li>\n
    4. Desired output<\/li>\n<\/ol>\n
      First of all, try to code the program in the most precise manner following the protocols of C <\/a>programming like,<\/p>\n