Understanding of int argc, char * * argv in C language main function

c Language main Functions are usually shaped like int main(int argc, char **argv), that argc and argv What does it mean ？

Actually ,argc It means incoming main The number of arguments to the function ; and argv It means incoming main A list of arguments to a function . Of course , Here argc and argv It can be changed to another name , because argc (argument count) and argv(argument vector) It's used a lot , So I suggest you use these two names for your code . in addition ,char ** A pointer representing a carton character pointer . The test code is as follows

#include <stdio.h>
int main(int argc, char **argv)
{
    
    int i=0;
    printf("%d\n",argc);
    for (i=0;i<argc;i++)
    {
    
        printf("%s\n",argv[i]);
    }
}

[[email protected] c]# ./a.out arg1 arg2 arg3
4
./a.out
arg1
arg2
arg3

Code after name change

#include <stdio.h>
int main(int count, char **vector)
{
    
    int i=0;
    printf("%d\n",count);
    for (i=0;i<count;i++)
    {
    
        printf("%s\n",vector[i]);
    }

}

[[email protected] c]# ./new one two three four
5
./new
one
two
three
four