Expt 1 - Part 1, Part 2 & Part 3

Explanation

This Java code implements a very basic calculator that performs four fundamental arithmetic operations: addition, subtraction, multiplication, and division. The key characteristic of this calculator is that it operates on fixed, predefined integer values rather than taking input from a user.

The program begins by declaring three integer variables: a, b, and c. Variables a and b are immediately initialized with values 10 and 5, respectively. Variable c is declared to store the result of each arithmetic operation.

Next, the code sequentially performs each operation:

1. Addition: It calculates a + b (which is 10 + 5), stores the result (15) in c, and then prints a descriptive message along with the value of c to the console.
2. Subtraction: It calculates a - b (which is 10 - 5), stores the result (5) in c, and prints a descriptive message and the value of c.
3. Multiplication: It calculates a * b (which is 10 * 5), stores the result (50) in c, and prints a descriptive message and the value of c.
4. Division: It calculates a / b (which is 10 / 5), stores the result (2) in c, and prints a descriptive message and the value of c.

Each operation overwrites the previous value stored in c, but since the results are printed immediately after each calculation, the previous results are not lost from the output. The program then terminates after printing all four results.

Algorithm

The algorithm used in this Java program is straightforward and sequential:

1. Start the program execution.
2. Declare three integer variables: a, b, and c.
3. Initialize variable a with the value 10.
4. Initialize variable b with the value 5.
5. Perform Addition: Calculate the sum of a and b, and store the result in c.
6. Display Addition Result: Print a message indicating "Addition: a+b is " followed by the value stored in c.
7. Perform Subtraction: Calculate the difference between a and b, and store the result in c.
8. Display Subtraction Result: Print a message indicating "Subtraction: a-b is " followed by the value stored in c.
9. Perform Multiplication: Calculate the product of a and b, and store the result in c.
10. Display Multiplication Result: Print a message indicating "Multiplication: a*b is " followed by the value stored in c.
11. Perform Division: Calculate the quotient of a divided by b, and store the result in c.
12. Display Division Result: Print a message indicating "Division: a/b is " followed by the value stored in c.
13. End the program execution.