[Solved] CS40032 Assignment 4- Lambda in C++

Instructions: Please solve the questions using pen and paper and scan the images. Every image should contain your roll number and name.

1. Answer the following questions based on the given instructions. [15]

(a) Write output of the following code snippet. 2

#include <iostream> using namespace std; int main(){ auto con= 8; auto l = [&](int x) { return x*con; } ;

con;

cout << l(5) << endl ; auto m = [=] ( int x ) { return x+con; } ;

++con; cout << l(5)<<endl<<m(5) <<endl ; return 0;

}

• Write output of the following code snippet. 2

#include <iostream> using namespace std; int main(){ int c=5; auto f1 = [=] ( ) mutable {++c ; cout << c ; } ; auto f2 = [&] ( ) mutable {c+=3 ; cout << c ; } ; f1() ; f2() ; cout << c ; f2();

cout << c ; return 0 ;

}

• Write a code snippet containing a lambda expression in C++ that will do the following: 3

Read a temperature value in Fahrenheit scale from the keyboard in a variable F.

Convert the temperature value to its corresponding value in Centigrade scale and store it in a variable C.

Print the value of C in the display.

Note that the temperature values are real numbers. Also, they can be positive, negative, or 0.

• Write a code snippet containing a lambda expression in C++ that will do the following: 3

Read the length L and width W of a rectangle.

Compute the area A and perimeter P of the rectangle.

Print the values of A and P with a suitable message.

You can assume that L and W are integers.

1

• Write a code snippet containing a lambda expression in C++ to compute and print the taxi fare based on the following chart. Total number of Kilometers traveled will be input by the user as an integer.

5

First 12 KM: Rs. 100/Next 4 KM: Rs. 8 / KM

Next 4 KM: Rs 6 / KM

Above 20 KM: Rs 5 / KM

The program will

Read in the distance traveled (integer but dont enter 0).

Print out the corresponding fare.

Example:- If user input is 27, then the total fare will be- (100+(4*8)+(4*6)+ (7*5)) = 191.

2. Write a C++ code to print all permutations of a given string using

• Lambda Expression.

[5 * 2 = 10]

You can print the permutations in any order and no character will be repeated in input string.

Example: For string ABC permutations will be:

ABC

ACB

BAC

BCA

CAB

CBA

2