mikroC
mikroC - C Compiler for Microchip PIC microcontrollers
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TYPES CONVERSIONS
C is strictly typed language, with each operator, statement and function demanding appropriately typed operands/arguments. However, we often have to use objects of “mismatching” types in expressions. In that case, type conversion is needed.
Conversion of object of one type is changing it to the same object of another type (i.e. applying another type to a given object). C defines a set of standard conversions for
Conversion is required in following situations:
-if statement requires an expression of particular type (according to language definition), and we use an expression of different type,
-if operator requires an operand of particular type, and we use an operand of different type,
-if a function requires a formal parameter of particular type, and we pass it an object of different type,
-if an expression following the keyword return does not match the declared function return type,
-if intializing an object (in declaration) with an object of different type.
In these situations, compiler will provide an automatic implicit conversion of types, without any user interference. Also, user can demand conversion explicitly by means of typecast operator. For more information, refer to Explicit Typecasting.
Standard Conversions
Standard conversions are built in C. These conversions are performed automatical- ly, whenever required in the program. They can be also explicitly required by means of typecast operator (refer to Explicit Typecasting).
The basic rule of automatic (implicit) conversion is that the operand of simpler type is converted (promoted) to the type of more complex operand. Then, type of the result is that of more complex operand.
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