From e8e8b9c76fb578d3f8e90b90b3c8a1c59cf0e901 Mon Sep 17 00:00:00 2001 From: Andy B Date: Fri, 9 Oct 2015 15:48:21 +0100 Subject: [C/en] Accessing command line arguments in main --- c.html.markdown | 10 ++++++++++ 1 file changed, 10 insertions(+) (limited to 'c.html.markdown') diff --git a/c.html.markdown b/c.html.markdown index db2ac930..345dca7f 100644 --- a/c.html.markdown +++ b/c.html.markdown @@ -27,6 +27,7 @@ Multi-line comments don't nest /* Be careful */ // comment ends on this line... */ // ...not this one! // Constants: #define +// Constants are written in all-caps out of convention, not requirement #define DAYS_IN_YEAR 365 // Enumeration constants are also ways to declare constants. @@ -56,6 +57,15 @@ int add_two_ints(int x1, int x2); // function prototype // Your program's entry point is a function called // main with an integer return type. int main(void) { + // your program +} + +// The command line arguments used to run your program are also passed to main +// argc being the number of arguments - your program's name counts as 1 +// argv is an array of character arrays - containing the arguments themselves +// argv[0] = name of your program, argv[1] = first argument, etc. +int main (int argc, char** argv) +{ // print output using printf, for "print formatted" // %d is an integer, \n is a newline printf("%d\n", 0); // => Prints 0 -- cgit v1.2.3