Question

A. Design an algorithm that takes 2 integers input from users in 2 variables, without using any other variable swap the values. Design its flow chart as well.

Answer 1

The algorithm is as follows

1. Start
2. Accept Input1 and Input2
3. Input1 = Input1 + Input2
4. Input2= Input1- Input2
5. Input1= Input1- Input2
6. Print Input1
7. Print Input2
8. Stop

See attachment for Flowchart

Line 1 and 8 of the algorithm starts and stops the algorithm

Line 2 accepts the two integer variables (input1 and input2)

Take for instance input1 = 5 and input2 = 4

Line 3 increases input1 by input2

At this point, Input1 = 5 + 4 = 9

Line 4 subtracts input2 from input1 and saves it in input2

i.e. Input2 = 9 - 4 = 5

Note that, the value of input2 has changed to the initial value of Input1

Line 5 subtracts input2 from input1 and saves it in input1

i.e. Input1 = 9 - 5 = 4

Note that, the value of input1 has changed to the initial value of Input2

Line 6 and 7 prints the new values of input1 and input2

The flowchart does the same thing as the algorithm; the only difference is that it uses lines and shapes to depict flow of program

The flowchart was designed using Microsoft Office Word