Zero Exception

Write a program to implement cat command of UNIX on DOS. cat <filename> to display files on the screen. cat < filename it is same as type command. cat > filename it is same as copy command. Program: #include <stdio.h> #include <stdlib.h> #include <string.h> #include <dirent.h> void main(){ setbuf(stdout,NULL); DIR *dir; struct dirent *ent; FILE *fp; char s[80],temp[80],c[5],f[50],a[2],p[2]; while(1){ printf("\nAP:>"); gets(s); if(strcmp(s,"exit")==0){ exit(0); } sscanf(s,"%s%s%s%s",c,a,f,p); printf("%s|%s|%s|%s",c,a,f,p); if(strcmp(c,"cat")!=0){ printf("invalid command"); }else if(strcmp(a,"<")==0 && strcmp(p,">")==0){ if((dir=opendir(f))==NULL){ perror("Unable to open direcotry."); exit(0); } while((ent= readdir(dir))!=NULL){ printf("%s\n",ent->d_name); } if(closedi...