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a novice problem

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Started by manipulator, Jun 05 2009 01:43 AM

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#1
manipulator
Posted 05 June 2009 - 01:43 AM

manipulator

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I'm totally new in C and have a problem in computing. The case is I need to have a 30% off on a number that the user has specified.

for example,

An item is worth 250

How will I compute it to have 30% off?

Sorry, I'm really new in programming.

#2
WingedPanther
Posted 05 June 2009 - 07:27 AM

WingedPanther

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Multiply by 0.7.
Programming is a branch of mathematics.
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#3
marwex89
Posted 05 June 2009 - 07:30 AM

marwex89

    Writes binary right handed and hex left handed

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Because:
100% = 100/100 = 1.0
you want 70% of the original number -> 70/100 = 0.7
In case you didn't know...

a *= 0.7;

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#4
dargueta
Posted 09 June 2009 - 12:02 AM

dargueta

    Writes binary right handed and hex left handed

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Note that if a is an integer, the decimal will get lopped off, not rounded to the nearest whole number.
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