C Language Command-line arguments Printing the command line arguments
Example
After receiving the arguments, you can print them as follows:
int main(int argc, char **argv)
{
for (int i = 1; i < argc; i++)
{
printf("Argument %d: [%s]\n", i, argv[i]);
}
}
Notes
- The
argvparameter can be also defined aschar *argv[]. argv[0]may contain the program name itself (depending on how the program was executed). The first "real" command line argument is atargv[1], and this is the reason why the loop variableiis initialized to 1.- In the print statement, you can use
*(argv + i)instead ofargv[i]- it evaluates to the same thing, but is more verbose. - The square brackets around the argument value help identify the start and end. This can be invaluable if there are trailing blanks, newlines, carriage returns, or other oddball characters in the argument. Some variant on this program is a useful tool for debugging shell scripts where you need to understand what the argument list actually contains (although there are simple shell alternatives that are almost equivalent).
