Homework 2: Making Decisions 1 Rewrite The Following Switch

Homework 2 Making Decisions1 Rewrite The Following Switch Statement

Homework 2: Making Decisions 1. Rewrite the following switch statement as a nested if statement using a series of if … else statements ( //if statement goes here )

2. Rewrite the following compound expression as nested if statement: int aValue, bValue; if ((aValue > bValue) && (bValue == 10)) Console.WriteLine("Test Complete"); ( //deduce your own value for variable aValue )

3. What is the result of following conditional expression: ( //Paste or type your output here ) COSC 1436

Paper For Above instruction

Making decisions in programming often involves selecting different execution paths based on specific conditions. In C#, switch statements provide a structured way to execute code blocks based on the value of a variable. However, sometimes it is necessary or preferable to use nested if-else statements for greater flexibility or clarity, particularly when dealing with complex conditions or ranges of values. This paper explores the process of converting a switch statement into nested if-else constructs, transforming compound expressions into nested if statements, and understanding the outcome of specific conditional expressions within the context of C# programming, exemplified in the course COSC 1436.

Converting Switch Statement to Nested if-Else

Suppose we have a switch statement controlling program flow based on a variable, such as:

switch (option)

{


case 1:


// code for case 1


break;


case 2:


// code for case 2


break;


case 3:


// code for case 3


break;


default:


// default code


break;


}

To convert this into nested if-else statements, we compare the variable with each case's value sequentially:

if (option == 1)

{


// code for case 1


}


else if (option == 2)


{


// code for case 2


}


else if (option == 3)


{


// code for case 3


}


else


{


// default code


}

This conversion preserves the decision logic but often results in longer code. Nested if-else statements are more flexible, allowing for complex decision criteria beyond simple equality checks.

Transforming Compound Expressions into Nested if Statements

Given the compound expression:

if ((aValue > bValue) && (bValue == 10))

Console.WriteLine("Test Complete");

We can express this as nested if statements by first testing one condition, then the other:

if (aValue > bValue)

{


if (bValue == 10)


{


Console.WriteLine("Test Complete");


}


}

In this transformation, the outer if checks if aValue > bValue. If true, then the inner if checks if bValue == 10. Only when both conditions are true does the program execute the Console.WriteLine statement. This nested structure mirrors the logical AND condition in the original expression, enhancing clarity and potential for additional nested conditions.

Evaluating a Conditional Expression

Consider the conditional expression:

result = (a > b) ? "A is greater" : "B is greater or equal";

The output depends on the current values of a and b. For example, if a = 15 and b = 10, then the condition a > b is true, and the expression evaluates to "A is greater". Conversely, if a = 5 and b = 10, the condition is false, and the expression evaluates to "B is greater or equal".

Understanding this expression is essential for controlling program flow based on dynamic comparisons. The conditional (ternary) operator provides a concise way to assign values based on boolean conditions, which is a fundamental aspect of decision-making in programming, including in courses such as COSC 1436.

In practice, students should test different scenarios, substituting various values for a and b, to observe how the output changes with different comparison results, strengthening their grasp of conditional logic.

Conclusion

Transforming switch statements into nested if-else structures and rewriting compound boolean expressions as nested if statements demonstrate important skills in controlling decision flow within a program. These practices allow programmers to craft more flexible and nuanced decision-making processes, which are foundational in software development, especially in languages like C# taught in COSC 1436. Understanding how to evaluate conditional expressions helps in designing efficient algorithms, debugging, and implementing complex logic that meets specific requirements.

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