12.1What's wrong withthe code"char c;
while((c = getchar()) != EOF) ..."?
12.2Whywon'tthecode `` while(!feof(infp)) { fgets(buf, MAXLINE, infp); fputs(buf, outfp); } '' work?
12.4My program's prompts and intermediate output don't always show upon the screen.
12.5How can I read one character at a time,without waiting for the RETURN key?
12.6How can I print a '%' character with printf?
12.9How canprintf use %f for type double, if scanf requires %lf?
12.10How can I implement a variable field width with printf?
12.11How can I print numbers with commas separating the thousands?
12.12Why doesn't the callscanf("%d", i) work?
12.13Why doesn'tthe code"double d;
scanf("%f", &d);"
work?
12.15How can I specify a variable width in a scanf format string?
12.19I'm re-prompting the user if scanf fails, but sometimes it seems to go into an infinite loop.
12.20Why does everyone say not to use scanf? What should I use instead?
12.23Why does everyone say not to use gets()?
12.24Why does errno contain ENOTTY after a call to printf?
12.25What's the difference between fgetpos/fsetpos and ftell/fseek?
12.26Will fflush(stdin) flush unread characters from the standard input stream?
12.30I'm trying to update a file in place,by using fopen mode "r+", but it's not working.
12.33How can I redirect stdin or stdout from within a program?
12.34Once I've used freopen, how can I get the original stream back?
12.38How can I read a binary data file properly?