Tutorial 8

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Compilation process in c

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   What is a compilation?        C is a programming language that converts source code into object code or machine code. The conversion process has four steps: Pre-processing, Compiling, Assembling, and Linking.      The preprocessor eliminates all the comments from the source code and carries out the preprocessor directives. For instance, it substitutes the directive <stdio.h> with the contents of the 'stdio.h' file.       The following are the phases through which our program passes before being transformed into an executable form:         Preprocessor         Compiler         Assembler         Linker Preprocessor A source code file is a text file that contains instructions written in the C programming language. The file name has a ".c" extension to indicate its format. Before compiling the source code, a preprocessor analyzes and modifies i...
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First C Program

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Before starting the abcd of C language, you need to learn how to write, compile and run the first c program. To write the first c program, open the C console and write the following code: #include <stdio.h> :-includes the standard input output library functions. The printf() function is defined in stdio.h . int main() :-The main() function is the entry point of every program in c language. printf() :-The printf() function is used to print data on the console. return 0 :-The return 0 statement, returns execution status to the OS. The 0 value is used for successful execution and 1 for unsuccessful execution. You will see the following output on user screen.
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printf() and scanf() in C

In C language, input and output operations are performed by the functions printf() and scanf(), which are built-in library functions defined in the header file stdio.h.
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