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C++ Intermediate | Mobile-Friendly

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By reference:


              
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void incValue(int &x) {
    x++;
}

int main() {
    int x = 1;
    incValue(x);
&nbsp;&nbsp;&nbsp;&nbsp;cout << x; 
&nbsp;&nbsp;&nbsp;&nbsp;return 0;
}
copy

Here we change x as the function works with the address (reference) of this variable. It can be useful in case you need to change the value of the parameters.

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What the main difference between passing by value and by reference?

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Section 4. Chapitre 8

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bookPass by Reference

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By reference:


              
12345678910

            
void incValue(int &x) {
&nbsp;&nbsp;&nbsp;&nbsp;x++;
}

int main() {
&nbsp;&nbsp;&nbsp;&nbsp;int x = 1;
&nbsp;&nbsp;&nbsp;&nbsp;incValue(x);
&nbsp;&nbsp;&nbsp;&nbsp;cout << x; 
&nbsp;&nbsp;&nbsp;&nbsp;return 0;
}
copy

Here we change x as the function works with the address (reference) of this variable. It can be useful in case you need to change the value of the parameters.

question mark

What the main difference between passing by value and by reference?

Select the correct answer

Tout était clair ?

Comment pouvons-nous l'améliorer ?

Merci pour vos commentaires !

Section 4. Chapitre 8
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