0x0D-preprocessor

0x0D. C - Preprocessor

Resource

• Understanding C program Compilation Process
• Object-like Macros
• Macro Arguments
• Pre Processor Directives in C
• The C Preprocessor
• Standard Predefined Macros
• Include Guard
• Common Predefined Macros

Tasks

0. Object-like Macro : A header file that defines a macro named SIZE as an abbreviation for the token 1024.
   • Compile the code this way: gcc -Wall -pedantic -Werror -Wextra -std=gnu89 0-main.c -o a
1. Pi : A header file that defines a macro named PI as an abbreviation for the token 3.14159265359.
   • Compile the code this way: gcc -Wall -pedantic -Werror -Wextra -std=gnu89 1-main.c -o b
2. File name : A program that prints the name of the file it was compiled from, followed by a new line.
   • You are allowed to use the standard library.
   • Compile the code this way: gcc -Wall -pedantic -Werror -Wextra -std=gnu89 2-main.c -o cc
   • Then you can try and create a copy of 2-main to 02-main.c then recompile this way: gcc -Wall -pedantic -Werror -Wextra -std=gnu89 02-main.c -o cc
3. Function-like macro : A function-like macro ABS(x) that computes the absolute value of a number x.
   • Compile the code this way: gcc -Wall -pedantic -Werror -Wextra -std=gnu89 3-main.c -o d
4. SUM : A function-like macro SUM(x, y) that computes the sum of the numbers x and y.
   • Compile the code this way: gcc -Wall -pedantic -Werror -Wextra -std=gnu89 4-main.c -o e