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  Tutorial: C and Cpp Programming in C and Cpp Typecasting Tutorial

Typecasting: making variables look like another data-type.

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Typecasting in C and Cpp Programming

Typecasting is making a variable of one type, such as an int, act like another type, a char, for one single operation. To typecast something, simply put the type of variable you want the actual variable to act as inside parentheses in front of the actual variable. (char)a will make 'a' function as a char.

One use for typecasting for is when you want to use the ASCII characters. For example, what if you want to create your own chart of all 256 ASCII characters.

To do this, you will need to use to typecast to allow you to print out the integer as its character equivalent.

This is more like a function call than a cast as the type to be cast to is like the name of the function and the value to be cast is like the argument to the function.

Typecasts in practice So when exactly would a typecast come in handy? One use of typecasts is to force the correct type of mathematical operation to take place. It turns out that in C and C++ (and other programming languages), the result of the division of integers is itself treated as an integer: for instance, 3/5 becomes 0! Why? Well, 3/5 is less than 1, and integer division ignores the remainder.


 

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