Answer / roshanpr

mutable key word is used when u want to make any member
variable of a const object modifyable.

Basically when u make a object constant u cannot modify its
data members. But during the declaration of the class if a
data member is declared as mutable it can changed.

Class my
{

mutable int age;

public:

my(){age=0;}
void plusplus(int b)const
{
age+=b;
}
};

int main()
{
const my obj;
obj.plusplus(40);
}

Answer / shakti singh khinchi

Mutable keyword is used to modify a data member of an object
which has declared as constant. for example:

class XYZ
{
public:
int i;
mutable int cc;
public:
XYZ();
};

int main()
{
const XYZ obj;
obj.cc = 100; // modify obj object's member "cc" which has
been declared as mutable.
}

Tell me what are static member functions?

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If P is the population on the first day of the year, B is the birth rate, and D is the death rate, the estimated population at the end of the year is given by the formula: The population growth rate is given by the formula: B – D Write a program that prompts the user to enter the starting population, birth and death rates, and n, the number of years. The program should then calculate and print the estimated population after n years. Your program must have at least the following functions: 1. growthRate: This function takes its parameters the birth and death rates, and it returns the population growth rate. 2. estimatedPopulation: This function takes its parameters the current population, population growth rate, and n, the number of years. It returns the estimated population after n years Your program should not accept a negative birth rate, negative death rate, or a population less than 2.

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Is there any problem with the following: char *a=NULL; char& p = *a;?

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i have given a project to create examination seating plan system in c++. so can anyone send me the answer of this question quickly??????

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Why do we need runtime polymorphism in c++?

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Why we use #include conio h in c++?

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What is the difference between inline functions and macros?

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What is the importance of mutable keyword?

0 Answers  

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