Explanation: The above program is same as previous one. In this program, the object a1 is
passed by address. Consider the following statements.
a)voidperiod(life*);
b)a1.period(&a1);
a)Yr=y1->expyr-y1->mfgyr;
The statement (a) is the prototype of the function period(). In this statement, the deference
operator (*) indicates that the function will accept address of the actual argument. The statement
(b) is used to pass the address of the argument to the function period(). The statement (c)
is used ...
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