Relational operators in C++ - Mini Project: Build & Apply

Relational Operators Practice

📖 Scenario: You are helping a store manager compare product prices to decide which items are cheaper or more expensive.

🎯 Goal: Build a simple C++ program that uses relational operators to compare two product prices and shows the comparison results.

📋 What You'll Learn

Create two variables to store product prices

Create a variable to hold a threshold price

Use relational operators to compare prices with each other and with the threshold

Print the results of the comparisons

💡 Why This Matters

🌍 Real World

Comparing prices helps shoppers and store managers decide which products are cheaper or more expensive.

💼 Career

Understanding relational operators is essential for decision-making logic in programming jobs like software development and data analysis.

1

Create product price variables

Create two double variables called price1 and price2 with values 19.99 and 24.99 respectively.

C++

#include 

int main() {
    // Create price1 and price2 variables
    // Your code here

    return 0;
}

Need a hint?

Use double type for prices and assign the exact values.

2

Add a threshold price variable

Create a double variable called threshold and set it to 20.00.

C++

#include 

int main() {
    double price1 = 19.99;
    double price2 = 24.99;
    // Create threshold variable
    // Your code here

    return 0;
}

Need a hint?

Use double type and assign the exact value 20.00.

3

Compare prices using relational operators

Use relational operators to create four bool variables: isPrice1Less for price1 < price2, isPrice2Greater for price2 > price1, isPrice1BelowThreshold for price1 < threshold, and isPrice2AboveThreshold for price2 > threshold.

C++

#include 

int main() {
    double price1 = 19.99;
    double price2 = 24.99;
    double threshold = 20.00;
    // Create bool variables using relational operators
    // Your code here

    return 0;
}

Need a hint?

Use < and > operators to compare the variables exactly as named.

4

Print the comparison results

Print the four boolean variables isPrice1Less, isPrice2Greater, isPrice1BelowThreshold, and isPrice2AboveThreshold each on a new line using std::cout. Print true or false for each value.

C++

#include 

int main() {
    double price1 = 19.99;
    double price2 = 24.99;
    double threshold = 20.00;

    bool isPrice1Less = price1  price1;
    bool isPrice1BelowThreshold = price1  threshold;

    // Print the boolean results
    // Your code here

    return 0;
}

Need a hint?

Use std::cout and the ternary operator to print true or false for each boolean variable.