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--- tools:c [2024/06/03 05:45] – Humphrey Boa-Gart
+++ tools:c [2024/08/06 05:48] (current) – external edit 127.0.0.1
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-{{wst>iw-update}}
+{{wst>iw-cleanup}}
 ====== C ======
@@ Line 76: / Line 76: @@
 That's the basic emo version of "Hello World", as shown in K&R's The C Programming Language. If you're really interested in C, that book is a must have. It'll explain a lot that this tutorial will gloss over. Now, let us explain everything in this code selection.
-Line 1: #include <stdio.h> This is a preprocessor command telling the compiler that we're going to use some standard IO functions. These functions allow us to print things to the command line and read in information from the keyboard.
+Line 1: ''#include <stdio.h>'' This is a preprocessor command telling the compiler that we're going to use some standard IO functions. These functions allow us to print things to the command line and read in information from the keyboard.
-Line 2: int main(int argc, char** argv) This line starts the "main" function, which is the primary entry point into your program. This function is common to all programs, and usually consists of calls to other functions and subroutines that actually do the work of the program. The word "int" here at the beginning refers to the fact that the main function returns an integer, usually 0. Other return values can be useful if your C code is intended to be used as a part of a shell script. The stuff inside the parentheses are the arguments for the main function, which are taken from the command line. The first argument here is an integer (hence the 'int') called "argc", and it tells us how many words were on the command line when the program was called. The second argument is the list of words called argv. argv[0] is the name of the program itself, as all lists in C start with 0 because system engineers and language writers back in the day were lazy. This program doesn't use this information, but others do.
+Line 2: ''<nowiki>int main(int argc, char** argv)</nowiki>'' This line starts the "main" function, which is the primary entry point into your program. This function is common to all programs, and usually consists of calls to other functions and subroutines that actually do the work of the program. The word "int" here at the beginning refers to the fact that the main function returns an integer, usually 0. Other return values can be useful if your C code is intended to be used as a part of a shell script. The stuff inside the parentheses are the arguments for the main function, which are taken from the command line. The first argument here is an integer (hence the 'int') called "argc", and it tells us how many words were on the command line when the program was called. The second argument is the list of words called argv. argv[0] is the name of the program itself, as all lists in C start with 0 because system engineers and language writers back in the day were lazy. This program doesn't use this information, but others do.
 Line 3: The open curly brace here opens the primary code block for the main function. That's all it does.
-Line 4: printf() prints shit to the screen through a terminal emulator. The arguments it takes consist of a string in double quotes with special symbols for variables, followed by the list of variables in the order they're used. A full explanation of the function can be found [[http://www.cplusplus.com/reference/clibrary/cstdio/printf.html|here]].
+Line 4: ''printf()'' prints shit to the screen through a terminal emulator. The arguments it takes consist of a string in double quotes with special symbols for variables, followed by the list of variables in the order they're used. A full explanation of the function can be found [[http://www.cplusplus.com/reference/clibrary/cstdio/printf.html|here]].
 Line 5: Here, we return the integer that the main function expects, namely 0.

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