What is the point of this

This is a discussion on What is the point of this within the C++ Programming forums, part of the General Programming Boards category; What is the point of using this: int main(argc,argv[]) instead of using plain and simple int main() Thanx for ur ...

  1. #1
    ¡Amo fútbol!
    Join Date
    Dec 2001
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    2,136

    What is the point of this

    What is the point of using this:

    int main(argc,argv[])

    instead of using plain and simple int main()



    Thanx for ur time.

  2. #2
    Registered User
    Join Date
    Dec 2001
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    194
    It allows you to send command line arguments to the program.
    So you could do something like this

    "myprog.exe command1 options"
    instead of asking the user inside the function what command / options they want to use

    and the correct syntax is
    int argv, char ** argc
    or
    int argv, char * argc[]

    either way gets compiled the same, the int argv tells you how many strings are in argc, so if you did this
    "myprog.exe one two three"
    argv = 4
    argc[0] = "myprog.exe" with a \0 at the end
    argc[1] = "one"
    argv[2] = "two"
    argv[3] = "three" all string have \0 appended to the end

    and you can call the variables whatever you want to, it just makes it easier for everyone else to read if you stick to the standard names

  3. #3
    Unregistered
    Guest
    and the correct syntax is
    int argv, char ** argc
    or
    int argv, char * argc[]
    You mean
    int main(int argc, char *argv[])
    or
    int main(int argc, char **argv)

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