Setting up a usage message cmd

Hi, I'm new to C programming and I'm currently working on an assignment that takes in cmd arguments and processes them.

My issue is providing a customized usage message. Do i just type:
usage:
//my message

and then its automatically saved?
How do I then call that usage message to be printed when a user enters -help in cmd

Oh, you mean something like this?

Code:

---

mycmd -h
mycmd --help

---

You have to make your program output the message you want when the user gives "-h" or "--help" through the command line. There are independent programs that display helpful information, such as "man" for linux.

The simpler implementation for what you want, albeit ad-hoc, is something like the following:

Code:

---

// Inside a loop
if (strcmp(argv[i], "-h") == 0 || strcmp(argv[i], "--help") == 0) {
    puts("Helpful message!");
}

---

Code:

---

void usage(void)
{
  printf("Usage:\n"
            "Syntax is: [command1 <arg1..>] [command2 <arg1..>]...\n"
            "Accepts --long and -short options as --long options\n"
            "some stuff here \n"
            "Some more stuff here\n"
            "even more stuff here\n"
       

            "\n");
}

---

saves from writing printf more than once.