How do i write the 'press r to repeat' code thing in C

[Helomegussta]

 

so i wrote a code that calculates the VAT , but i want it to ask the user 'Press (R) to Repeat Or Any Other Key to Quit' but it doesn't work for some reason , am not that good at C yet so if anyone could help or explain in simple for ,what i need to do that would be great 

[trag1c]

It appears that you don't have a label for repeat at all so you're goto statement doesn't actually jump anywhere. Unless I missed it somewhere in there.

 

It should look something like.

// snip
repeat:
printf(....);
scanf(....);
// snip

 

[minibois]

Work with functions and have the R button trigger the function, so it outputs what you want.

Just make most of your code into a function and have that function triggered once by the main and then have it trigger itself 

 

I don't know how to write C and I can't copy your code because it's a screenshot, so here is some pseudocode:

int main()
{
	RunVATCode();
}

void RunVATCode()
{
	// Insert the code above here
    // if the user presses R? run RunVATCode(); again
    // Else? terminate program.
}

 

There are of course dozens of other ways to achieve this, but this would IMO be the simplest to implement, just have a function that calls itself, or terminates the program.

 

[Helomegussta]

4 minutes ago, minibois said:

Work with functions and have the R button trigger the function, so it outputs what you want.

Just make most of your code into a function and have that function triggered once by the main and then have it trigger itself 

 

I don't know how to write C and I can't copy your code because it's a screenshot, so here is some pseudocode:

int main()
{
	RunVATCode();
}

void RunVATCode()
{
	// Insert the code above here
    // if the user presses R? run RunVATCode(); again
    // Else? terminate program.
}

 

There are of course dozens of other ways to achieve this, but this would IMO be the simplest to implement, just have a function that calls itself, or terminates the program.

 

thank you 

[trag1c]

I would also add that goto shouldn't be used unless it greatly simplifies your code. goto is a trap for young players since it's very easy to abuse because it can do anything with zero regard for scope. This makes it easier to introduce bugs and makes it harder to fix them. Additionally, it makes code harder to follow in most cases since the code no longer follows any sort of logical progression since it can now jump anywhere. It's a big trap for young players.

 

In your case a while loop (or do while) or as @miniboishas suggested a recursive function might fit the bill as well.