C/C++ main

int main(int argc, char *argv[]) 
==
int main(int argc, char **argv)

char *argv[] = {"hello","hi"};
char argv[] = {'h','e','l','l','o','h','i'};

char *argv[]//是一个数组，存储char指针
char argv[] //是一个数组，存储char

argc 是计算有几个字符串的

argc = sizeof (argv) / sizeof *argv