The main function

Read first Task 2

Every C++ program starts at main(). It returns an int to the operating system.

Definition and example

The main function is the focus of this lesson. Every C++ program starts at main(). It returns an int to the operating system. The task asks you to apply that idea in a small example: Where does a C++ program start executing. Before you run the code, predict what should happen. Then Inspect the program output and the compiler message if it fails and compare it with your prediction. If the result differs, change one relevant line and run it again. Testing one change at a time makes the cause of a result easier to understand.

C++ 1 automatic check Section 1 · First programs

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// TASK the-main-function-02: Where does a C++ program start executing?
// STEPS: Read the explanation. Change one relevant line at a time, then run the code and compare the result with the check on the right.
#include <iostream>
using namespace std;

int main() {
    cout << "TODO" << endl;
    return 0;
}

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Your result

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Checks on this task:

The program output must match “Fee tracker 1.0”.

The task and step-by-step instructions are written as comments at the top of the editor. Change one relevant line, run it, and compare the result with these checks.

Incorrect attempts before answer: 0 / 3

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The main function

The main function

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