Linux C main function parameters

The main function has two parameters.

Main (INT argc, char * argv [])

The first one is that integer represents the total number of parameters;

The second is a struct array. argv [0] refers to commands, that is, general CProgramFile Names (Compiled executable files in Linux), argv [1], argv [2]... are all corresponding parameters.

For example, I compiled a program to copy the program of file1 to file2.C LanguageCodeThe executable file name after compilation is copy.

In use, my format is copy file1 file2;

Where argv [0] refers to copy; argv [1] refers to file1; argv [2] refers to file2.