101 Question: Passing Numeric Command-Line Arguments

[zmarcoz]

I read a book, there is a small program which add 2 numbers.

The "add" program begins from
int main(int argc, char *argv[])

In the command line input
C> add 100.2 232


My question is both 2 values are converted by using atof(argv[1]) & atof(argv[2]), where does argc goes?? what does the function of argc?

[garob]

argc is the number of arguments. It is the program name plus the number of arguments, in your case 2. So your argc will contain the number 3.