Inside the code editor we've tried to define and call a function that would print the messages Hey coder! then Welcome back! to the console.
So when we ran the code, we expected it to print:
Hey coder!
Welcome back!
but it seems like we made some mistakes because when we run our code we get:
Welcome back!
Hey coder!
Assignment:
Your task is to fix our code such that it will print the desired output.
The core challenge here is to ensure that the function calls are made in the correct order. The significance of this problem lies in understanding the sequence of function calls and their execution order in C++. A common pitfall is assuming that the order of function definitions affects the order of execution, which is not the case.
To solve this problem, we need to ensure that the function which prints "Hey coder!" is called before the function that prints "Welcome back!".
Let's start by examining a naive solution and then move towards an optimized solution.
In the naive approach, we might define both functions and call them in the order we want them to execute. However, if the calls are not in the correct order, the output will be incorrect.
The optimized solution involves simply ensuring that the function calls are made in the correct order. This is a straightforward problem with a simple fix.
1. Define a function to print "Hey coder!".
2. Define a function to print "Welcome back!".
3. Call the function that prints "Hey coder!" first.
4. Call the function that prints "Welcome back!" second.
#include <iostream>
// Function to print "Hey coder!"
void printHeyCoder() {
std::cout << "Hey coder!" << std::endl;
}
// Function to print "Welcome back!"
void printWelcomeBack() {
std::cout << "Welcome back!" << std::endl;
}
int main() {
// Call the functions in the correct order
printHeyCoder();
printWelcomeBack();
return 0;
}
The time complexity of this solution is O(1) because the functions are called a fixed number of times, regardless of the input size. The space complexity is also O(1) as no additional space is used that scales with input size.
There are no significant edge cases for this problem since it involves fixed function calls. However, ensure that the functions are defined correctly and called in the correct order.
To test the solution, simply run the program and verify that the output matches the expected result:
Hey coder!
Welcome back!
Testing frameworks like Google Test can be used for more complex scenarios, but for this simple problem, manual testing is sufficient.
When approaching problems involving function calls and execution order, always ensure that you understand the sequence in which functions need to be executed. Practice by solving similar problems and pay attention to the order of operations.
In this blog post, we discussed how to fix a simple bug in C++ code involving the order of function calls. We explored the problem, understood the core challenge, and provided a step-by-step solution with code implementation. Understanding such problems is crucial for mastering function calls and execution order in programming.