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C++ Intermediate | Mobile-Friendly
course content

Kursusindhold

C++ Intermediate | Mobile-Friendly

C++ Intermediate | Mobile-Friendly

1. Data Types and Arrays
The Basic Concept of the MemoryDatatypes Modifiers SizeOfRandomRandom Not RandomMulti-Dimensional ArraysFill ArraysLoops thought Multi-Dimensional Arrays
2. References & Pointers
PointersDeeping into PointersDereferencingBack to MemoryPointers’ ArithmeticReferencesPointers vs ReferencesFeatures
3. Dynamic Memory
Static MemoryDynamic MemoryNewDeletePointer CleanerDynamic ArraysSum Up!
4. Functions
Basics of FunctionsDeclarationParametersMore about ParametersDefaultReturnPass by ValuePass by ReferencePass the ArrayDeclaration vs Definition | PrototypeOverloading

book
Pass 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:


              
12345678910

            
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

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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Sektion 4. Kapitel 7

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course content

Kursusindhold

C++ Intermediate | Mobile-Friendly

C++ Intermediate | Mobile-Friendly

1. Data Types and Arrays
The Basic Concept of the MemoryDatatypes Modifiers SizeOfRandomRandom Not RandomMulti-Dimensional ArraysFill ArraysLoops thought Multi-Dimensional Arrays
2. References & Pointers
PointersDeeping into PointersDereferencingBack to MemoryPointers’ ArithmeticReferencesPointers vs ReferencesFeatures
3. Dynamic Memory
Static MemoryDynamic MemoryNewDeletePointer CleanerDynamic ArraysSum Up!
4. Functions
Basics of FunctionsDeclarationParametersMore about ParametersDefaultReturnPass by ValuePass by ReferencePass the ArrayDeclaration vs Definition | PrototypeOverloading

book
Pass 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:


              
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().

Var alt klart?

Hvordan kan vi forbedre det?

Tak for dine kommentarer!

Sektion 4. Kapitel 7
Vi beklager, at noget gik galt. Hvad skete der?
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