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Problem with division operation

Hello, everyone! I'm have a problem here. This is my code:

 HealthPrecent = (RealHealth / Health) * 100.0f;
 UE_LOG(LogTemp, Warning, TEXT("%s - RealHealth is %d"), *GetName(), RealHealth);
 UE_LOG(LogTemp, Warning, TEXT("%s - Health is %d"), *GetName(), Health);
 UE_LOG(LogTemp, Warning, TEXT("%s - HealthPrecent is %f"), *GetName(), HealthPrecent);

This code run OnBeginPlay and next one when Unit have a damage. So, on start I have that in log:

 LogTemp:Warning: Enemy - RealHealth is 500
 LogTemp:Warning: Enemy - Health is 500
 LogTemp:Warning: Enemy - HealthPrecent is 100.000000
 LogTemp:Warning: MyUnit - RealHealth is 1500
 LogTemp:Warning: MyUnit - Health is 1500
 LogTemp:Warning: MyUnit - HealthPrecent is 100.000000

That correct. 500/500*100=100

But, when unit has a damage I see this in Log:

 LogTemp:Warning: MyUnit has damage!
 LogTemp:Warning: MyUnit - RealHealth is 1400
 LogTemp:Warning: MyUnit - Health is 1500
 LogTemp:Warning: MyUnit - HealthPrecent is 0.000000
 LogTemp:Warning: Enemy has damage!
 LogTemp:Warning: Enemy - RealHealth is 400
 LogTemp:Warning: Enemy - Health is 500
 LogTemp:Warning: Enemy - HealthPrecent is 0.000000

??? 400/500*100=80...

Why I'll got null here?

Thanks!

Product Version: UE 4.12
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asked Jul 21 '16 at 03:17 PM in C++ Programming

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Shiggi
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Cause 400/500 = 0 in C++. You need to convert your values to float ;)

Another example to be clear. In C++:

  • 1 / 2 = 0

  1. / 2.0 = 0.5

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answered Jul 21 '16 at 03:25 PM

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NymKappa
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avatar image Shiggi Jul 21 '16 at 06:15 PM

Ou, that's the problem) Great! Many thanks for quick help!

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