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