Use functions to reuse code

Read first Task 28

Small functions are easier to test and change.

Definition and example

Use functions to reuse code is the focus of this lesson. Small functions are easier to test and change. The task asks you to apply that idea in a small example: Why split code into small functions. 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 3 · Functions

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// TASK use-functions-to-reuse-code-08: Why split code into small functions?
// 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 monthly_after_discount(int fee, int percent) {
    return fee - (fee * percent) / 100;
}

int main() {
    // TODO: produce the required output for this task.
    cout << monthly_after_discount(11667, 10) << endl;
    return 0;
}

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Your result

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Checks on this task:

The program output must match “8100 10501”.

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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Use functions to reuse code

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