When should a type cast not be used?

A type cast should not be used to override a const or volatile declaration. Overriding these type modifiers can cause the program to fail to run correctly. A type cast should not be used to turn a pointer to one type of structure or data type into another. In the rare events in which this action is beneficial, using a union to hold the values makes the programmer�s intentions clearer. �

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shivakumara.madegowda
Profile Answers by shivakumara.madegowda

Mar 20th, 2007

we should not cast the big datatype to smaller one. Like from double to float long to integer. TIn these cases there will be chance of loosing the valuable data itself.

kbjarnason
Profile Answers by kbjarnason

Jul 2nd, 2010

And it should never, ever, EVER be used to cast the return from malloc, at least in C (and if you're using C++, why are you using malloc?)