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The program asks for bugs like this:


14 1

14 1


But I don't want input like this.


14 1


What I have tried:

#include <stdio.h>

int main() {
    int n, i, count = 0;
    float price, total = 0, discount = 0, max_discount = 0;

    scanf("%d", &n);

    for(i = 0; i < n; i++) {
        scanf("%f", &price);
        total += price;

    if(n == 1 || n == 2) {
        if(total < 20)
            discount = 0;
            discount = total * 0.1;
    } else {
        if(total < 20)
            discount = total * 0.07;
        else {
            discount = total * 0.15;
            if(discount > total * 0.5)
                discount = total * 0.5;

    for(i = 0; i < n; i++) {
        scanf("%f", &price);
        if(price > 7)
            discount += total * 0.01;

    printf("%.2f\n", total - discount);

    return 0;
Updated 3-May-23 18:56pm
Rick York 3-May-23 17:14pm    
Do you have a question?

Also - your program deals with prices and discounts. What do bugs have to do with it?
Richard MacCutchan 4-May-23 7:15am    
Why are you trying to enter two numbers (14 1) when your code only accepts a single value?

1 solution

This is not a good question - we cannot work out from that little what you are trying to do.
Remember that we can't see your screen, access your HDD, or read your mind - we only get exactly what you type to work with - we get no other context for your project.
Imagine this: you go for a drive in the country, but you have a problem with the car. You call the garage, say "it broke" and turn off your phone. How long will you be waiting before the garage arrives with the right bits and tools to fix the car given they don't know what make or model it is, who you are, what happened when it all went wrong, or even where you are?

That's what you've done here. So stop typing as little as possible and try explaining things to people who have no way to access your project!

So all I can do is be generic, and say that compiling successfully does not mean your code is right! :laugh:
Think of the development process as writing an email: compiling successfully means that you wrote the email in the right language - English, rather than German for example - not that the email contained the message you wanted to send.

So now you enter the second stage of development (in reality it's the fourth or fifth, but you'll come to the earlier stages later): Testing and Debugging.

Start by looking at what it does do, and how that differs from what you wanted. This is important, because it give you information as to why it's doing it. For example, if a program is intended to let the user enter a number and it doubles it and prints the answer, then if the input / output was like this:
Input   Expected output    Actual output
  1            2                 1
  2            4                 4
  3            6                 9
  4            8                16
Then it's fairly obvious that the problem is with the bit which doubles it - it's not adding itself to itself, or multiplying it by 2, it's multiplying it by itself and returning the square of the input.
So with that, you can look at the code and it's obvious that it's somewhere here:
int Double(int value)
   return value * value;

Once you have an idea what might be going wrong, start using the debugger to find out why. Put a breakpoint on the first line of the method, and run your app. When it reaches the breakpoint, the debugger will stop, and hand control over to you. You can now run your code line-by-line (called "single stepping") and look at (or even change) variable contents as necessary (heck, you can even change the code and try again if you need to).
Think about what each line in the code should do before you execute it, and compare that to what it actually did when you use the "Step over" button to execute each line in turn. Did it do what you expect? If so, move on to the next line.
If not, why not? How does it differ?
Hopefully, that should help you locate which part of that code has a problem, and what the problem is.
This is a skill, and it's one which is well worth developing as it helps you in the real world as well as in development. And like all skills, it only improves by use!
Share this answer
mohammedhaj6 4-May-23 4:22am    
I have a problem with the inputs, the program asks that I enter 3 values, and I only need two values, the number of items in the first entry, and the prices of items in the second entry, an example of what I want:
14 1

The program wants me to enter the price twice. I want to enter the price once. How do I solve this problem?
OriginalGriff 4-May-23 6:28am    
You are entering a total of four numbers:

If you expect that to be two, then you probably need a decimal point between the "14" and the "1"
mohammedhaj6 4-May-23 6:40am    
Why don't you understand what I mean? My words are clear. I want the program to ask the user to enter only twice, once the number of items that the user purchased, and the second time the prices of the items.
OriginalGriff 4-May-23 7:26am    
So what is stopping you from doing just that?
You wrote the code, you understand the code.

Where are you stuck?
What help do you need?
mohammedhaj6 4-May-23 7:59am    
I want you to help me fix the error

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