#include
#include
int main(int argc, char *argv[])
{ FILE *fd;
char c;
if(argc==1)
fd=stdin;
else
if((fd = fopen(argv[1], “r”))==NULL){
fprintf(stderr, “Error opening %s, exiting\n”, argv[1]); exit(0);
}
while( (c=getc(fd)) != EOF)
putc(c, stdout);
exit(0);
}