Parameters argc and argv of main()

C In language main() function , Usually with 2 Parameters , for example int main (int argc, char* argv[]), This is a typical main Declaration of functions .

The parameters are as follows ：

     argc:  Integers , For transmission to main() Number of command line parameters for .
     argv:  Array of strings .
              stay DOS 3.X In the version , argv[0] The full pathname for the program to run ; Yes DOS 3.0
              The following version , argv[0] For the empty string ("") .
              argv[1] For in DOS The first string after the execution program name in the command line ;
              argv[2] Is the second string after the program name ;
              ...
              argv[argc] by NULL.