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Oppiskele Pass by Value | Functions
C++ Intermediate | Mobile-Friendly

bookPass by Value

When we pass function arguments, there are two ways to do this:

  • By value: the function's variable copies the parameter's value without changing the argument.
  • By reference: the function's variable copies the reference of the parameter by changing the argument.

By value:

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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

As you can see by the output, x didn't change since we changed the copy of x in the function incValue().

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Osio 4. Luku 7

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bookPass by Value

Pyyhkäise näyttääksesi valikon

When we pass function arguments, there are two ways to do this:

  • By value: the function's variable copies the parameter's value without changing the argument.
  • By reference: the function's variable copies the reference of the parameter by changing the argument.

By value:

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

As you can see by the output, x didn't change since we changed the copy of x in the function incValue().

Oliko kaikki selvää?

Miten voimme parantaa sitä?

Kiitos palautteestasi!

Osio 4. Luku 7
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