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What is this format specifier?
(lemm.ee)
What is %.2f? Why is it not just %f? Is there some additional calculation happening? The half function already does all the calculations including splitting the bill, so I'm not sure what %.2f is. (Btw why is this code not formatting correctly in lemmy?)
#include
#include
float half(float bill, float tax, int tip);
int main(void)
{
float bill_amount = get_float("Bill before tax and tip: ");
float tax_percent = get_float("Sale Tax Percent: ");
int tip_percent = get_int("Tip percent: ");
printf("You will owe $%.2f each!\n", half(bill_amount, tax_percent, tip_percent));
}
// TODO: Complete the function
float half(float bill, float tax, int tip)
{
bill += (bill * (tax / 100.0));
bill += (bill * (tip / 100.0));
bill /= 2;
return bill;
}
If you want multi-line code, you need to put it like this:
For these kinds of questions, your best friend is the documentation. In particular, a
man 'printf(3)'yields:Wouldn't
man 3 printfdo the same thing without the quotes?Yup that definitely does the same thing.
If anyone else is wondering why the
3is there, it's because usually you won't find just oneprintf. You have theprintfuser command, theprintffunction from the standard C library, and POSIX manual entries for both theprintfuser command and C function. The id number is then an identifier for the corresponding section of theprintfentry, and you can list all of them by doing aman -f printf.Awesome, I think I'm gonna consider aliasing
mantoman -flol. Can you think of any compelling reason not to?Actually, nevermind, I misunderstood you.
-fjust lists the pages, it doesn't print all of their content.Nit: 3 is the manual section in which to look for the named entry (aka page), not a section of the entry.
Wrote it in an awkward way but yeah I meant to say the section where you can find the corresponding entry ๐ฌ
Wait, you can use
manon C functions?On libc functions yes. Maybe on some from other libs, if they provide man pages.
That's nice.
You can if you have those man pages installed.
You might also enjoy
man ascii,man operator, or evenman intro.Unfortunately, there are still some gaps:
Yup! Try also
man malloc๐Nice :)
Back in my day, MS-DOS let you use
HELPon QBASIC commands.