Calculating miles,cals, fat

This is a discussion on Calculating miles,cals, fat within the C Programming forums, part of the General Programming Boards category; I have problem on the last line where i need to print 2 values - grams_of_fat and pounds. What am ...

  1. #1
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    Calculating miles,cals, fat

    I have problem on the last line where i need to print 2 values - grams_of_fat and pounds.
    What am i doing wrong since pounds are not printing out?
    Attached Files Attached Files

  2. #2
    and the hat of wrongness Salem's Avatar
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    Code:
    $ gcc -W -Wall -ansi -pedantic -O2 foo.c
    foo.c: In function `main':
    foo.c:21: warning: ISO C90 does not support the `%lf' printf format
    foo.c:23: warning: ISO C90 does not support the `%lf' printf format
    foo.c:26: warning: ISO C90 does not support the `%lf' printf format
    foo.c:26: warning: ISO C90 does not support the `%lf' printf format
    foo.c:29: warning: implicit declaration of function `system'
    foo.c:8: warning: 'grams_of_fat' might be used uninitialized in this function
    You're calculating the result before you've input the data.
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  3. #3
    Frequently Quite Prolix dwks's Avatar
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    system() is in stdlib.h.

    Also, printf()'s %f handles both doubles and floats. You only need %lf when scanf()'ing doubles.
    dwk

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