Programming in Modern C++ Week 4 Assignment Answers
Are you looking for the NPTEL Programming in Modern C++ Assignment 4 Answers 2024? You’ve come to the right place! This resource provides comprehensive solutions to all the questions from the Week 4 assignment, helping you navigate through the complexities of modern C++ programming.
using namespace std; class Number { int value; public: Number(int_value = 0) value(_value) {} // LINE-1 }; void show (Number &n) { cout << n.value; } int main() { Number n(10); show(n); return 0; } Fill in the blank at LINE-1 such that the program will print 10. a) void friend show (Number&); b) static void show (Number&); c) friend void show (Number&); d) void const show (Number&);
Answer:a) void friend show (Number&); , c) friend void show (Number&);
Q4.Consider the following code segment.
include
using namespace std; int num = 5; namespace space { int num = 15; } int main() { using namespace space; int num = 10; { cout << : : num << << num << << space::num; } return 0; } What will be the output/error? a) 5 10 15 b) 10 5 15 c) 15 5 10 d) Compilation Error: reference to ‘num’ is ambiguous
The cout statement at LINE-1 gives an error. Change the cout statement such that it prints Welcome. a) std::cout << message; b) using cout << message; c) using std::cout << message; d) std.cout << message;
Answer:a) std::cout << message;
Q6. Consider the following code segment.
include
using namespace std; int y = 2; namespace name2 { int y = 4; } int main() { int y = 3; cout << <<< endl; // LINE-1 return 0; } Fill in the blank at LINE-1 so that the program will print 6. a) name2::y+ :: y b) name2::y+ y c) y+::y d) name2.y+:: y
using namespace std; class X { int x; public: X(int x) x(x) {} int getValue() { return x; } }; class Y { static X obj; public: static int getValue() { return obj.getValue(); } }; int main(void) { cout << Y::getValue(); return 0; }
What will be the output/error? a) 0 b) 10 c) Compilation error: cannot access static object obj d) Compilation error: undefined reference Y::obj
using namespace std; class Counter { static int count; public: Counter() { count++; } static int getCount() { return count; } }; int Counter::count = 5; int main() { cout << Counter::getCount() << “; Counter c [3]; cout << Counter::getCount(); return 0; } What will be the output? a) 58 b) 5 9 c) 68 d) 69
using namespace std; class Alpha { int x = 15; _; // LINE-1: }; class Beta { public: int increase (Alpha &a) { return (a.x + 5); } }; int main() { Alpha a1; Beta b1; cout << bi.increase (a1); return 0; } Fill in the blank at LINE-1 such that the program will print 20. a) friend class Beta b) class friend Beta c) friend int increase (Alpha&) d) friend int Beta:: increase (Alpha&)
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These are Programming in Modern C++ Week 4 Assignment Answers
Quiz
Q1. Consider the following program. Fill in the blank at LINE-1 so that the program will print 30. a) friend class ReTest b) class friend ReTest c) static class ReTest d) const class ReTest
Answer: a) friend class ReTest
Q2. Consider the following program. Fill in the blank at LINE-1 so that the program will print 012. a) using Test b) namespace Test c) using namespace Test d) using namespace Test: :var
Answer: c) using namespace Test
Q3. Consider the following code segment. Fill in the blank at LINE-1 so that the program will print 9.81. a) mutable double b) const double c) static double d) double mutable
Answer: a), d)
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These are Programming in Modern C++ Week 4 Assignment Answers
Q4. Consider the following code segment. What will be the output? a) 10 b) 15 c) 20 d) 25
Answer: d) 25
Q5. Consider the following code segment. Fill in the blank at LINE-1 so that the program will print 5. a) display() b) myClass: :display() c) myClass.display() d) myClass->display()
Answer: b) myClass: :display()
Q6. Consider the following code segment. Change the LINE-1 with the appropriate option so that the program will run successfully. a) using cout < greet; b) using std:: cout « greet; c) std:: cout < greet; d) std.cout < greet;
Answer: c) std:: cout < greet;
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These are Programming in Modern C++ Week 4 Assignment Answers
Q7. Consider the following code segment. Which line/s will generate a compilation error? a) LINE-1 b) LINE-2 c) LINE-3 d) LINE-4
Answer: a) LINE-1
Q8. Consider the following code segment. What will be the output /error? a) 0 b) 5 c) Compilation error: inaccessible object c1 d) Compilation error: undefined reference classB:: c1
Q9. Consider the following code segment. What will be the output? а) 0 3 b) 0 4 c) 1 3 d) 1 4
Answer: b) 0 4
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These are Programming in Modern C++ Week 4 Assignment Answers
Programming
Question 1
Consider the program below. • Fill in the blank at LINE-1 with appropriate keyword, • Fill in the blank at LINE-2 with appropriate return type of the function, • Fill in the blank at LINE-3 with the appropriate initialization statement of the static variable obj. The program must satisfy the given test cases.
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Question 2
Consider the following program. • Fill in the blank at LINE-1 with the appropriate statement such that the global function can access private class members, • Fill in the blank at LINE-2 with the appropriate statement such that the global function can access private class members The program must satisfy the sample input and output.
Solution:
#include<iostream>
using namespace std;
class B;
class A {
int x;
public:
A(int _x) : x(_x) { cout << "Class A: "; }
friend void print(int a, int b);
};
class B {
int x;
public:
B(int _x) : x(_x) { cout << "Class B: "; }
friend void print(int a, int b);
};
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These are Programming in Modern C++ Week 4 Assignment Answers
Question 3
Consider the following program. • Fill in the blanks at LINE-1, LINE-2, LINE-3 and LINE-4 with appropriate keywords The program must satisfy the sample input and output.
Solution:
#include<iostream>
using namespace std;
class Emp{
int id;
mutable double basic; //LINE-1
mutable double salary; //LINE-2
public:
Emp(int i, double b, double s=0) : id(i), basic(b), salary(s){ }
void setBasic(double b) const{ //LINE-3
basic = b;
}
friend double calculate(const Emp&); //LINE-4
};
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These are Programming in Modern C++ Week 4 Assignment Answers
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These are Programming in Modern C++ Week 4 Assignment Answers
Programming
Question 1 Consider the following program. Fill in the blanks as per the instructions given below: • Complete the variable declaration at LINE-1, • Complete the function prototype at LINE-2 and LINE-3 with appropriate keywords such that it will satisfy the given test cases.
Solution:
#include<iostream>
using namespace std;
class Employee
{
const int id;
string name;
mutable int salary;
public:
Employee(int a, string b, int c) : id(a), name(b), salary(c) {}
void updateSal(int x) const
{
salary += x;
}
void print() const
{
cout << id << " : " << name << " : " << salary;
}
};
These are Programming in Modern C++ Week 4 Assignment Answers
Question 2 Consider the following program. Fill in the blanks as per the instructions given below. • at LINE-1 with appropriate forward declaration, • at LINE-2 with appropriate statement such that it will satisfy the given test cases
Solution:
#include<iostream>
using namespace std;
class B;
class A
{
int a_ = 0;
public:
A(int x) : a_(x) {}
int mulB (B&);
int subtractB (B&);
};
class B
{
int b_;
public:
B(int y) : b_(y) { }
friend int A::mulB(B&), A::subtractB(B&);
};
These are Programming in Modern C++ Week 4 Assignment Answers
Question 3 Consider the following program. Fill in the blanks at LINE-1, LINE-2 and LINE-3 with appropriate statements such that it will satisfy the given test cases.
Solution:
#include<iostream>
using namespace std;
class Singleton{
int data;
static Singleton *ins;
Singleton(int i) : data(i) {}
public:
int get(){ return data; }
static Singleton* createIns(int i)
{
if(!ins)
ins = new Singleton(i);
return ins;
}
~Singleton(){ cout << data; }
};
These are Programming in Modern C++ Week 4 Assignment Answers
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Quiz
Q1. Consider the following code segment. What will be the output/error? a) 15 b) 20 c) 30 d) Compilation Error : myClass::s is a static data member; it can only be initialized at its definition
Answer: d) Compilation Error : myClass::s is a static data member; it can only be initialized at its definition
Q2. Consider the following code segment. What will be the output? a) 2,5 4,6 b) 6,5 2,11 c) 6,11 2,5 d) 2,5 6,11
Answer: d) 2,5 6,11
These are Programming in Modern C++ Week 4 Assignment Answers
Q3. Consider the following code segment. What will be the output/error? a) 0 1 2 b) 0 2 2 c) 2 0 1 d) Compilation Error: reference to ‘var’ is ambiguous
Answer: a) 0 1 2
Q4. Consider the following code segment. Fill in the blank at LINE-1 such that the output will be 4 5. a) mutable b) static c) const d) friend
Answer: b) static
These are Programming in Modern C++ Week 4 Assignment Answers
Q5. Consider the following code segment. Fill in the blank at LINE-1 such that the program will print 15. a) using e::e1 : : x b) using e::e1 c) using namespace e::e1 d) using namespace e
Answer: a) using e::e1 : : x
These are Programming in Modern C++ Week 4 Assignment Answers
Q6. Consider the following code segment. Fill in the blank at LINE-1 such that the output is 10. a) int mutable b) mutable int c) volatile int d) const int
Answer: a, b
These are Programming in Modern C++ Week 4 Assignment Answers
Q7. Consider the following code segment. Fill in the blank at LINE-1 such that the output is 5. a) name::Student s(5) b) Students (5) c) name. Student s(5) d) using name::Student s(5)
Answer: a) name::Student s(5)
These are Programming in Modern C++ Week 4 Assignment Answers
Q8. Consider the following code segment. Fill in the blank at LINE-1 such that the program will print (2,5). a) Point& operator<<(ostream&, Point&) b) friend Point& operator<<(ostream&, Point&) c) Point& friend operator<<(ostream&, Point&) d) const Point& operator<<(ostream&, Point&)
Answer: b) friend Point& operator<<(ostream&, Point&)
These are Programming in Modern C++ Week 4 Assignment Answers
Q9. Consider the following code segment. Fill in the blank at LINE-1 such that the program will print 5 15. a) static class B b) friend class B c) class friend B d) using class B
Answer: b) friend class B
These are Programming in Modern C++ Week 4 Assignment Answers
Assignment Questions
Question 1
Consider the program below which defines a class Database. Complete the program with the following instructions. • Fill in the blank at LINE-1 to complete the declaration of member variable ins. • Fill in the blank at LINE-2 to specify the return type of createIns() function. • Fill in the blank at LINE-3 to call the createIns() function with parameter i. The program must satisfy the given test cases.
Solution:
#include<iostream>
using namespace std;
class Database{
int id;
static Database *ins;
Database(int i) : id(i) {}
public:
int getIns(){ return id; }
static Database *createIns(int i){
if(!ins)
ins = new Database(i);
return ins;
}
~Database();
};
Database *Database::ins = 0;
void fun(int i){
Database *s = Database::createIns(i);
These are Programming in Modern C++ Week 4 Assignment Answers
Question 2
Consider the following program. • Fill in the blanks at LINE-1 to complete forward declaration. • Fill in the blank at LINE-2 with appropriate function declaration so that function calculate can access private data member of TotalAmount class. The program must satisfy the sample input and output.
Solution:
#include<iostream>
using namespace std;
class Interest; //LINE-1
class TotalAmount{
double prinAmt;
double amt = 0;
public:
TotalAmount(double p) : prinAmt(p){}
double calculate(Interest&);
};
class Interest{
double in;
public:
Interest(double i) : in(i){ }
friend class TotalAmount; //LINE-2
};
These are Programming in Modern C++ Week 4 Assignment Answers
Question 3
Consider the following program. Fill in the blanks as per the instructions given below: • at LINE-1 to complete operator overload function, • at LINE-2 and LINE-3 to calculate subtraction of two position class. such that it will satisfy the given test cases.
Solution:
#include<iostream>
using namespace std;
class position{
int x, y;
public:
position(int a, int b) : x(a), y(b) {}
position operator-(const position& p1){
position p(0,0);
p.x = x-p1.x;
p.y = y-p1.y;
return p;
}
These are Programming in Modern C++ Week 4 Assignment Answers
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