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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
Random Not Random

The random we made in the previous chapter is not random values. You can run your program twice and see that nothing changes.

For this purpose, you can use the function srand(), which sets the seed value, the number, which will be the breakpoint for the program to get a random value. For instance:


              
12

            
srand(42);
cout << rand();
copy

Wait, we used a random value in the program to generate a random value? It’s not the best idea for the seed parameter. To avoid such problems, you can use the time displayed on your computer as the seed. The procedure is not so complicated. You need only use time(0) in srand() function and add ctime to your includes.

python

Remember, you should use the function srand() only once to set the seed value.

question mark

Which lines of code do you need to make truly random values?

Select the correct answer

Var alt klart?

Hvordan kan vi forbedre det?

Tak for dine kommentarer!

Sektion 1. Kapitel 5

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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
Random Not Random

The random we made in the previous chapter is not random values. You can run your program twice and see that nothing changes.

For this purpose, you can use the function srand(), which sets the seed value, the number, which will be the breakpoint for the program to get a random value. For instance:


              
12

            
srand(42);
cout << rand();
copy

Wait, we used a random value in the program to generate a random value? It’s not the best idea for the seed parameter. To avoid such problems, you can use the time displayed on your computer as the seed. The procedure is not so complicated. You need only use time(0) in srand() function and add ctime to your includes.

python

Remember, you should use the function srand() only once to set the seed value.

question mark

Which lines of code do you need to make truly random values?

Select the correct answer

Var alt klart?

Hvordan kan vi forbedre det?

Tak for dine kommentarer!

Sektion 1. Kapitel 5
Vi beklager, at noget gik galt. Hvad skete der?
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