38>>int Main (int argc, char **argv)

1. Parameters

(sometimes the parameter is void)

ARGC is the number of parameters when the program runs

ARGV is an array of stored parameters, which can be used with char* argv[] or char **argv.

For example, compiling a hello.c program

1 #include <stdio.h>
2 int main (int argc,char *argv[])
3 {
4 printf ("%d\n", argc);
5 printf ("%s\n", argv[0]);
6/*printf ("Hello World");
7 return 0;
8}
Compile run:./hello hehe

Results:

2

./hello

If the output is argv[1], the hehe is output.

2, int

This is often the case where the return type of the main function definition is int (not void), and there is no return 0 at the end of the function; This statement is strange.

38>>int Main (int argc, char **argv)