Lära Challenge: Ternary Operator

The ternary operator is a powerful tool that often used to make quick decisions in your code and can greatly improve code readability when used appropriately.

ternary.h


              1
            
condition ? expression_if_true : expression_if_false;

The condition is evaluated. If the condition is true, the expression before the : is executed, otherwise, the expression after the : is executed.

The ternary operator is essentially just an alternative to the if-else statement, providing the code readability and convenience.

if_else.h

ternary.h


              123456789
            
int variable;
if (condition)
{
    variable = 25;
}
else
{
    variable = 10;
}

As you can see it using ternary operator can save code space and improve readability and efficiency. However, it is important to save a balance and maintain code maintainability and understandability.

Ternary operators can also be nested to handle more complex conditions. But don't fall into a pitfall full of ternary operatorsю

nested_ternary.h


              12345678910
            
std::string eligibility = 
    age < 18 
        ? "Too young"
        : (isStudent
            ? (hasJob
                ? "Eligible for student discount"
                : "Eligible for student perks")
            : (hasJob
                ? "Eligible for job-related benefits"
                : "Not eligible"));

It's really hard to understand what is going on. So it is better to limit yourself to a single ternary operator, with a maximum of one level of nesting at any given time.

Uppgift

Swipe to start coding

You are building a student performance evaluator. Given three test scores, the program should calculate the average score and determine the performance category using a ternary operator.

Inside the function evaluatePerformance, calculate the average of the three scores (score1, score2, score3) by adding them and dividing by 3.0.
Use a ternary operator to determine the performance category based on the average:
- If the average is 85 or higher -> "Excellent".
- If the average is 70 or higher but less than 85 -> "Good".
- If the average is 50 or higher but less than 70 -> "Average".
- Otherwise -> "Fail".
Return the performance category from the function.

Example

evaluatePerformance(90, 87, 92) → "Excellent"
evaluatePerformance(75, 70, 72) → "Good"
evaluatePerformance(55, 60, 50) → "Average"
evaluatePerformance(40, 45, 30) → "Fail"

Lösning

solution.cpp

Var allt tydligt?

Tack för dina kommentarer!

Avsnitt 3. Kapitel 1

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The ternary operator is a powerful tool that often used to make quick decisions in your code and can greatly improve code readability when used appropriately.

ternary.h


              1
            
condition ? expression_if_true : expression_if_false;

The condition is evaluated. If the condition is true, the expression before the : is executed, otherwise, the expression after the : is executed.

The ternary operator is essentially just an alternative to the if-else statement, providing the code readability and convenience.

if_else.h

ternary.h


              123456789
            
int variable;
if (condition)
{
    variable = 25;
}
else
{
    variable = 10;
}

Ternary operators can also be nested to handle more complex conditions. But don't fall into a pitfall full of ternary operatorsю

nested_ternary.h


              12345678910
            
std::string eligibility = 
    age < 18 
        ? "Too young"
        : (isStudent
            ? (hasJob
                ? "Eligible for student discount"
                : "Eligible for student perks")
            : (hasJob
                ? "Eligible for job-related benefits"
                : "Not eligible"));

It's really hard to understand what is going on. So it is better to limit yourself to a single ternary operator, with a maximum of one level of nesting at any given time.

Uppgift

Swipe to start coding

You are building a student performance evaluator. Given three test scores, the program should calculate the average score and determine the performance category using a ternary operator.

Inside the function evaluatePerformance, calculate the average of the three scores (score1, score2, score3) by adding them and dividing by 3.0.
Use a ternary operator to determine the performance category based on the average:
- If the average is 85 or higher -> "Excellent".
- If the average is 70 or higher but less than 85 -> "Good".
- If the average is 50 or higher but less than 70 -> "Average".
- Otherwise -> "Fail".
Return the performance category from the function.

Example

evaluatePerformance(90, 87, 92) → "Excellent"
evaluatePerformance(75, 70, 72) → "Good"
evaluatePerformance(55, 60, 50) → "Average"
evaluatePerformance(40, 45, 30) → "Fail"

Lösning

solution.cpp

Byt till skrivbordet för praktisk övningFortsätt där du är med ett av alternativen nedan

Var allt tydligt?

Tack för dina kommentarer!

Avsnitt 3. Kapitel 1

single