Supermarket checkout C program

This is a discussion on Supermarket checkout C program within the C Programming forums, part of the General Programming Boards category; Hi im a newbie and im not very good so far but i need to be for my university course! ...

  1. #1
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    Supermarket checkout C program

    Hi im a newbie and im not very good so far but i need to be for my university course!

    anyway i need to make a program that uses loops and adds up numbers as they're typed in, in float values, and keep a running total, and once the user enters a zero value the program should stop reading numbers and print out (a) the grand total (b) the number of items.

    Im so stuck i cant even think!

    Hope you can help cheers!

    oh forgot to say im not using scanf we have our own simpleio library.

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    Please post the code

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    if you can call this code this is where im stuck!

    #include <stdio.h>
    #include "/home/simpleio.h"

    int main()

    {
    float a = 0,
    printf(" Type in price of product\n"); a = getFloat();

    while (a > 0)
    {
    printf(" Type in price of product\n");

  4. #4
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    what is the problem man u are facing ??

  5. #5
    Woof, woof! zacs7's Avatar
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    Sure you don't mean...

    Code:
    while((a = getFloat()) != 0.0f)
    {
       /* ... do something */
    }
    
    /* print totals */
    ...?

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    i dont know how to complete it

  7. #7
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    Ok What you are not doing is

    you are not taking any values from the user

    just use scanf for taking the user input

    Code:
    take input in a 
    
    while ( a != 0) {
      do calculation
    }

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    whats wrong with getFloat?

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    Where is getFlot man
    ??

    Can u paste that code also if that code is on your machine how can i know, Whatz the problem what that ???

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    #include <stdio.h>
    #include "/home/simpleio.h"

    int main()

    {
    float a = 0,
    printf(" Type in price of product\n"); a = getFloat();

    while (a > 0)
    {
    printf(" Type in price of product\n");


    this is literally all i can think of im crap at this

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    Is getFloat is a standard library function or a user defined function ???

    And if user defined than can you please paste the code ??

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    standard library

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    Quote Originally Posted by tom619 View Post
    standard library
    Ok if that is the case, than what you can do

    Code:
    while (a != getFloat() {
       // Do Calculations
    }

  15. #15
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    Quote Originally Posted by RockyMarrone View Post
    Ok if that is the case, than what you can do

    Code:
    while (a != getFloat() {
       // Do Calculations
    }
    No. That is not any viable solution. Entering "1" then "1" will break the loop.

    I have posted a viable loop above... why not use it?

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