Nested conditional statements in C++ - Mini Project: Build & Apply

Nested Conditional Statements

📖 Scenario: You are creating a simple program to help a store clerk decide discounts based on customer membership and purchase amount.

🎯 Goal: Build a program that uses nested if statements to check if a customer is a member and then check their purchase amount to decide the discount.

📋 What You'll Learn

Create a variable isMember of type bool with value true or false

Create a variable purchaseAmount of type double with a specific value

Use nested if statements to check isMember and then purchaseAmount

Print the correct discount message based on conditions

💡 Why This Matters

🌍 Real World

Stores often give discounts based on membership and purchase amount. This program mimics that decision process.

💼 Career

Understanding nested conditions is important for writing clear decision-making code in many software jobs.

1

Create membership and purchase amount variables

Create a bool variable called isMember and set it to true. Create a double variable called purchaseAmount and set it to 120.0.

C++

// Your code here

Need a hint?

Use bool for true/false and double for decimal numbers.

2

Add a discount threshold variable

Create a double variable called discountThreshold and set it to 100.0.

C++

bool isMember = true;
double purchaseAmount = 120.0;
// Your code here

Need a hint?

This variable will help decide if the purchase amount qualifies for a discount.

3

Write nested if statements to check membership and purchase amount

Write nested if statements: first check if isMember is true. Inside it, check if purchaseAmount is greater than discountThreshold. If both are true, set a string variable discountMessage to "You get a 20% discount!". Otherwise, set discountMessage to "No discount available.". If isMember is false, set discountMessage to "Join our membership for discounts!".

C++

bool isMember = true;
double purchaseAmount = 120.0;
double discountThreshold = 100.0;
// Your code here

Need a hint?

Remember to include #include <string> at the top to use std::string.

4

Print the discount message

Write a std::cout statement to print the discountMessage variable.

C++

bool isMember = true;
double purchaseAmount = 120.0;
double discountThreshold = 100.0;
#include 
#include 

std::string discountMessage;

if (isMember) {
    if (purchaseAmount > discountThreshold) {
        discountMessage = "You get a 20% discount!";
    } else {
        discountMessage = "No discount available.";
    }
} else {
    discountMessage = "Join our membership for discounts!";
}

// Your code here

Need a hint?

Use std::cout << discountMessage << std::endl; to print the message.