SafeSubtract

The latest version of this topic can be found at SafeSubtract.

Subtracts two numbers in a way that protects against overflow.

Syntax

template<typename T, typename U>  
inline bool SafeSubtract (  
   T t,  
   U u,  
   T& result  
) throw ();

Parameters

[in] t
The first number in the subtraction. This must be of type T.

[in] u
The number to subtract from t. This must be of type U.

[out] result
The parameter where SafeSubtract stores the result.

Return Value

true if no error occurs; false if an error occurs.

Remarks

This method is part of SafeInt Library and is designed for a single subtraction operation without creating an instance of the SafeInt Class.

Note

This method should only be used when a single mathematical operation must be protected. If there are multiple operations, you should use the SafeInt class instead of calling the individual stand-alone functions.

For more information about the template types T and U, see SafeInt Functions.

Requirements

Header: safeint.h

Namespace: Microsoft::Utilities

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