Thread: Help, please

  1. #1
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    Help, please

    Hey everyone, I am 100% brand new to C programming. I currently am stuck on a few programs I am trying to create for practice. The program runs perfectly, but the output doesn't reflect the answer I am trying to get. It continues to put out 0.00 as the final answer.
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  2. #2
    Registered User rstanley's Avatar
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    Please post your code as plain text in Code Blocks, not as an unclear image.

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    Quote Originally Posted by rstanley View Post
    Please post your code as plain text in Code Blocks, not as an unclear image.
    Sorry about that. The photo was clear on my computer.
    Code:
    #include <stdio.h> 
    
    
    int main () //start of program
    
    
    {
     float tax=.08, total, sale; //signifies variables
    
    
        
    printf("Please enter the sales amount."); //output to user to enter sales amount
        
            
    scanf("%f",&sale);    //User inputs total sale amount
        
        
    total=sale*tax;    //Assignment expression to calculate sales tax
        
        
    printf("Your total sales tax is:%.2f\n", &total); //final output from calculations
        
    
    
    return 0;          //end of program
    }
    Last edited by Salem; 1 Week Ago at 10:58 PM. Reason: Added code tags

  4. #4
    and the hat of int overfl Salem's Avatar
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    Compile with warnings enabled.
    Code:
    $ gcc -Wall foo.c
    foo.c: In function ‘main’:
    foo.c:21:36: warning: format ‘%f’ expects argument of type ‘double’, but argument 2 has type ‘float *’ [-Wformat=]
       21 | printf("Your total sales tax is:%.2f\n", &total); //final output from calculations
          |                                 ~~~^     ~~~~~~
          |                                    |     |
          |                                    |     float *
          |                                    double
    Your final printf is wrong, you don't normally have & in your printf statements unless you're using the %p format.
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
    If at first you don't succeed, try writing your phone number on the exam paper.

  5. #5
    Registered User rstanley's Avatar
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    Quote Originally Posted by downsidelove View Post
    Sorry about that. The photo was clear on my computer.
    You can't compile, test, and debug a fuzzy image!

  6. #6
    and the hat of int overfl Salem's Avatar
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    It's the whacked font that makes 'o' and '0' look identical which isn't helping either.
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
    If at first you don't succeed, try writing your phone number on the exam paper.

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    Thank you! @Salem
    Last edited by downsidelove; 1 Week Ago at 03:09 PM.

  8. #8
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    Hey, When I run the program, output showing - Please enter the sales amount.Your total sales tax is:0.00. Have you try to enter some amount?

  9. #9
    and the hat of int overfl Salem's Avatar
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    Did you even fix the problems pointed out?
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
    If at first you don't succeed, try writing your phone number on the exam paper.

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