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Unions
A union is also like a structure, except that only single variable in the union is stored in the allocated memory at a time. It is a collection of mutually exclusive variables, which means all of its member variables share the similar physical storage and only one variable is explained at a time. The size of the union is equal to the largest member variables. A union is defined as follows :
union tag
{
type memvar1;
type memvar2;
type memvar3;
:
};
A union variable of this data type can be declared as follows,
Union tag variable_name;
e.g.
union utag
int num;
char ch;
union tag filed;
The above union will have two bytes of storage allocated to it. The variable num can be accessed as field.sum and ch is accessed as field.ch. At any time, only one of these two variables, can be referred to. Any change made to single variable affects another.
Aim: To implement a program to add two polar coordinates using operator overloading. Code: #define PI 3.14 class polar { double
Unary Minus Operator( Negation) This operand can be used to negate the value of a variable. It is also used to state a negative number, here a minus(-) sign is prefixed to the
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A: No. If they're utilized properly, they increase encapsulation. You frequently require splitting a class in half while the two halves will have distinct numbers of instances o
Question 1 What are the different steps in executing a C program? Explain Question 2 What are the commonly used input/output functions in C? How are they accessed?
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