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authorAndy B <andyjtbrown@gmail.com>2015-10-09 15:48:21 +0100
committerAndy B <andyjtbrown@gmail.com>2015-10-09 15:48:21 +0100
commite8e8b9c76fb578d3f8e90b90b3c8a1c59cf0e901 (patch)
tree1deea3b4f8d9da3b25bd787344d448c32d81283d /c.html.markdown
parentda1fedc7418f90cd68c6dd865c3ac0c7919b56c0 (diff)
[C/en] Accessing command line arguments in main
Diffstat (limited to 'c.html.markdown')
-rw-r--r--c.html.markdown10
1 files changed, 10 insertions, 0 deletions
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 <keyword>
+// 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