5. Functions

Parameters and return values

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Inputs and outputs of a function

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Parameters are the variables in the function header. Arguments are the values you pass when you call it.

The return type says what comes back. return expression; ends the function and provides that value.

A function can take multiple parameters: int max2(int a, int b).

int max2(int a, int b) {
    if (a > b) return a;
    return b;
}

int main() {
    cout << max2(3, 8) << endl;  // 8
    return 0;
}

Check 2

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In max2(3, 8), what are 3 and 8?

Fill in 3

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Try it 4

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Call max2 with other pairs.

main.cpp

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Program input (stdin)

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Assignment 5

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Write int triple(int x) that returns 3 * x. In main, read one int and print triple(n).

main.cpp

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