Assume that there is a struct type called data and that we wish to program a function f that takes 2 data input (read-only) parameters a and b and yields a result also of type data .

What is the most appropriate declaration of f , if sizeof(data) exceeds the word size of 8 bytes in a 64-bit machine?

Question

Assume that there is a struct type called  data  and that we wish to program a function  f  that takes 2 data input (read-only) parameters  a  and  b  and yields a result also of type  data .
 
 What is the most appropriate declaration of  f , if  sizeof(data)  exceeds the word size of 8 bytes in a 64-bit machine?

Answer

void f(data a, data b, data& result)

Answer

data f(data a, data b)

Answer

void f(const data& a, const data& b, data& result)

Answer

data f(const data& a, const data& b)

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