#include <stdio.h>#include <sys/types.h>#include <sys/stat.h>#include <unistd.h>int main(int argc,char* argv[]){	struct stat file_stat;		if(argc!=2){		printf("Usage:%s filename\n",argv[0]);		return 1;	}	if(stat(argv[1],&file_stat)==-1){		perror("Cannot get the information of the file!\n");		return 1;	}	if(S_ISREG(file_stat.st_mode))		printf("%s is Regular File,Judged by S_ISREG\n",argv[1]);			if(file_stat.st_mode & S_IFREG)		printf("%s is Regular File,Judeged by bits calculate S_IFREG\n",argv[1]);	if(S_ISDIR(file_stat.st_mode))		printf("%s is Directory,Judged by S_ISDIR\n",argv[1]);	if(file_stat.st_mode & S_IFDIR)		printf("%s is Directory,Judged by bit calculate S_ISDIR\n",argv[1]);		printf("Owner ID: %d, Group ID: %d\n",file_stat.st_uid,file_stat.st_gid);        printf("Permission: %o\n",file_stat.st_mode & 0x1ff);	printf("Last Access Time: %15s\n",ctime(&file_stat.st_atime));	printf("Last Modification Time: %15s\n",ctime(&file_stat.st_mtime));	printf("Last Status Change Time: %15s\n",ctime(&file_stat.st_ctime));		return 0;}