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Tip of the Day
Home » Tip Bank » C++
Language: C++
Expertise: Beginner
Jun 6, 1997

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Type casting

Question:
I've read the following example about type casting:
int i;
          float f;
          f=float(i);
Can you explain what happens to variables f and i on line 3, and could you give me a more understandable example of type casting?

Answer:
Type casts are used to convert data from one type to another. In the above example there is no need to do any type casting, because there is a well-defined conversion between types float and int. Other situations, however, may require the use of explicit casts. For example:

enum A {A1,A2};

int i;
A a;

i = A1; // OK
a = i; // error need type cast
a = A(i); // OK
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