User:Lth/Learn C

Hello World - Desktop vs. MCU

When learning any programming language, the first "project" will typically be a small program which prints out "Hello World!".

Standard UNIX

On a standard UNIX system, that program, implemented in standard C, would typically look something like this:

1 #include <stdio.h>
2 
3 int main(void) {
4     printf("Hello World!\n");
5     return 0;
6 }

Most UNIX like systems have (or bloody should have) a C compiler, typically named cc, so above hello.c can be built into a binary executable thus:

$ cc hello.c -o hello

This will produce a binary hello, which can now be executed:

$ ./hello
Hello World!

Embedded

To be added

Variables & Fixed-Width Types

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Control Flow & Decision Making

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Loops & Iteration

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Functions & Modular Code

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Bitwise Operations Masterclass

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Pointers Demystified

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Arrays & Pointer Arithmetic

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Structs & Memory Alignment

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The volatile Keyword

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Type Casting & Unions

To be added

Function Pointers & Callbacks

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Enums & State Machines

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Dynamic Memory vs. Static Allocation

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Macros, Pragmas & Preprocessor

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Miscellaneous Links

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