MulDiv function

Multiplies two 32-bit values and then divides the 64-bit result by a third 32-bit value. The final result is rounded to the nearest integer.

Syntax

C++


int MulDiv(
  _In_ int nNumber,
  _In_ int nNumerator,
  _In_ int nDenominator
);

Parameters

nNumber [in]: The multiplicand.
nNumerator [in]: The multiplier.
nDenominator [in]: The number by which the result of the multiplication operation is to be divided.

Return value

If the function succeeds, the return value is the result of the multiplication and division, rounded to the nearest integer. If the result is a positive half integer (ends in .5), it is rounded up. If the result is a negative half integer, it is rounded down.

If either an overflow occurred or nDenominator was 0, the return value is -1.

Requirements

Minimum supported client	Windows XP [desktop apps \| Windows Store apps]
Minimum supported server	Windows Server 2003 [desktop apps \| Windows Store apps]
Header	Winbase.h (include Windows.h)
Library	Kernel32.lib
DLL	Kernel32.dll

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