CMPT 100 Lecture Notes - Productivity Software

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12 Oct 2012

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There are many kinds of errors that can arise when programming. Finding errors by creating suites of test data that will reveal them. Sometimes, the test data is created before any code is written: test-first programming. Finding no errors does not mean that the program is error-free, it just means that no errors were found! Finding no errors does not mean that the program is error-free, it just means that no errors were found: it doesn"t mean there are no errors. Testing and debugging are not the same thing! It is one thing thing to build correct programs that are small (say, fewer than one thousand lines) Analogy: a large software system is like a city. A helpful analogy may be to consider a large software system to be like a city. Software engineering is the process of building large software systems. Software engineers are people who build such software.

Related Questions

Type of Errors For each of the following answer whether they would cause an compiler error, runtime error, or a bug. In other cases the mentioned error may not cause a problem for the computer and is merely a question of style. In this case you should choose "Style" In other cases the question may not cause a problem at all in which case you should answer "No Error" For the purpose of this question, you can use the following definitions: • Compiler error : An error that occurs during the compilation phase of your development. In this case no class file is produced. • Runtime error: An error that occurs while you are running your program. Your program starts to execute but terminates before the main method has finished executing. • Logical error or bug : An error that results in the wrong results being seen • Style error: The error does not make a difference to the computer but is something that may be considered bad code. 7. Omitting a semi-colon at the end of a variable assignment. (A) Compiler Error (B) Bug (logical) Error (C) Style (D) Runtime Error (E) No Error

Your friend is paranoid about privacy and wants to encrypt everything. But your friend does not know
anything about programming. So, he wants you to code a program for him, which will automate the
encryption process for him. The program will first take a plain text/input text and an encryption key
(integer). Then, it will reverse the plain text, replace whitespaces with ‘*’ then shift the alphabets of the
plain text according to the encryption key. Finally, it would show the cipher-text/ encrypted text.

Input Structure:
● T, plain text.
● K, encryption key.

shovon

Your program will take an arithmetic expression as a String input. For Example:

“1+2*(3/4)”

“1+2*[3*3+{4–5(6(7/8/9)+10)–11+(12*8)]+14”

“1+2*[3*3+{4–5(6(7/8/9)+10)}–11+(12*8)/{13+13}]+14”

Program

Your program will determine whether the open brackets (the square brackets, curly braces and the parentheses) are closed in the correct order.

Outputs:

Output 1

1+2*(3/4)

This expression is correct.

Output 2

1+2*[3*3+{4–5(6(7/8/9)+10)–11+(12*8)]+14

This expression is NOT correct.

Error at character # 10. ‘{‘- not closed.

Output 3

1+2*[3*3+{4–5(6(7/8/9)+10)}–11+(12*8)/{13+13}]+14

This expression is correct.

Output 4

1+2]*[3*3+{4–5(6(7/8/9)+10)–11+(12*8)]+14

This expression is NOT correct.

Error at character # 4. ‘]‘- not opened.

Task 1

Solve the above problem using an array-based stack.

Task 2

Solve the above problem using a linked list-based stack.

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CMPT 100 Lecture Notes - Productivity Software

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