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Title UNIX cat like utility
Author Sourav Datta
Author Email soura_jagat [at] yahoo.com
Description This is a UNIX cat command like utility that can print any
number of files in the command prompt by using the syntax cat
... and it can create file and write to it using the command
cat -w .
Category C » Beginners / Lab Assignments
Hits 320792
Code Select and Copy the Code
#include<stdio.h> #include<string.h> #include<conio.h> int main(int argc,char* argv[]){ FILE* fp; int i=0; char c; if(argc==1){ fprintf(stderr,"Error using cat... "); exit(2); } if(!strcmp(argv[1],"-w")){ /* This returns 1 if match is found */ if(argc!=3){ fprintf(stderr,"Invalid no. of arguments "); exit(2); } fp=fopen(argv[2],"w"); if(fp==NULL) { fprintf(stderr,"Error in opening file... "); exit(2); } c=getchar(); while(c!=EOF) { fputc(c,fp); c=getchar(); } fclose(fp); } else{ for(--argc;argc>0;argc--){ fp=fopen(argv[++i],"r"); if(fp==NULL){ fprintf(stderr,"File not found...Aborting "); exit(2); } while((c=fgetc(fp))!=EOF) fputc(c,stdout); fclose(fp); } } }

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