C++ Projects
Projects and Practical Applications
Learn how to apply your C++ knowledge to real-world projects.
In this section, we will build mini applications using the features you've learned throughout the tutorial.
Why Build Projects?
Projects are an essential part of learning C++. Start small and gradually add more features:
- Understand how real programs are structured
- Practice combining concepts (e.g., functions, loops, file handling)
- Improve your debugging and problem-solving skills
- Prepare for job interviews and relevant exercises
Tip: The more you build, the better you understand.
Project Examples
Some examples of fun C++ projects could be:
- Calculate a Students Average
- Simple Calculator
- Address Book
- To-Do List
- Guess a Number Game
- Quiz Game
Project: Calculate a Students Average
Let's create a program to calculate a student's average from multiple grades.
The program asks the user to enter 1 to 5 grades and calculates the average. Then display the average and a corresponding letter grade (A to F):
Example
// This function returns a letter grade based on the average
char gradeFunction(double avg) {
if (avg >= 90) return 'A';
else if (avg >= 80) return 'B';
else if (avg >= 70) return 'C';
else if (avg >= 60) return 'D';
else return 'F';
}
int main() {
int count; // Number of grades the user wants to enter
double sum = 0, grade;
// Sum stores total grades, grade holds each input
// Ask the
user to enter total grades between 1 to 5
cout << "How many
grades (1 to 5)? ";
cin >> count;
//
Validate that count is between 1 and 5
if (count < 1 ||
count > 5) {
cout << "Invalid number. You must enter
between 1 and 5 grades.\n";
return 1; // Exit
}
// Loop to collect each grade
for (int i = 1; i <= count; i++) {
cout << "Enter grade " << i << ": ";
cin >> grade;
sum += grade;
}
// Calculate the average score
double avg = sum / count;
// Display numeric average
cout << "Average: " << avg << "\n";
// Display letter grade
cout << "Letter grade: " <<
gradeFunction(avg) << "\n";
return 0;
}
Example output:
How many grades (1 to 5)? 3
Enter grade 1: 85
Enter grade 2: 91
Enter grade 3: 78
Average: 84.6667
Letter grade: B
Key Concepts Used: loops, functions, conditions, input handling, and basic logic.
Practice Challenge
Try to make your own projects. For example, write a program that:
- Asks for your name
- Asks for your age
- Prints:
Hi <name>! You will turn <age+1> next year.
Open CodeBlocks or any similar C++ IDE, and experiment on your own!
Tip: Start small. Add one feature at a time. Test often!
