Question

Write the definition of a function named newbie that receives no parameters and returns true the first time it is invoked (when it is a "newbie"), and that returns false every time that it is invoked after that.

Answer 1

Answer:

The function definition to this question can be described as follows:

bool newbie() //defining a bool method newbie

{

static bool y = true ; // defining a static bool variable y and assign value true

bool t1=y; //defining bool variable t1 and assign value of variable y

y=false; // assigning value in variable y

return t1; // return value of variable t1

}

Explanation:

The program to this question can be described as follows:

Program:

#include <iostream> //defining header file

using namespace std;

bool newbie() //defining a bool method newbie

{

static bool y = true ; // defining a static bool variable y and assign value true

bool t1=y; //defining bool variable t1 and assign value of variable y

y=false; // assigning value in variable y

return t1; // return value of variable t1

}

int main() //defining main method

{

int s,s1; //defining integer variable s,and s1

s=newbie(); // variable s that call method

cout<<s<<endl; //print value

s1=newbie();//variable s that call method

cout<<s1;  //print value

return 0;

}

Output:

1

0

Description:

The description of the above function can be described as follows:

• In the above method definition a boolean method "newbie" is declared, which can't accept any parameters, inside the method, two boolean variable "y and t1" is declared.
• In this variable, variable y is a static boolean variable, that assigns a true value, and in t1 variable, we hold static variable value.  
• In the next step, the "y" variable assigns a value, that is false and returns variable t1 value.
• In the next step, the main method is declared, inside these two integer variable s, s1 is declared, that calls a method, and prints it value in the first time, it will print 1, that means the false and second time it will print 0, that means false.