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Void Type
void is a special type indicating the absence of any value. There are no objects of
void; instead, void is used for deriving more complex types.
Void Functions
Use the
void keyword as a function return type if the function does not return a
value. For example:
void print_temp(char temp) {
Lcd_Out_Cp("Temperature:");
Lcd_Out_Cp(temp);
Lcd_Chr_Cp(223);
// degree character
Lcd_Chr_Cp('C');
}
Use void as a function heading if the function does not take any parameters.
Alternatively, you can just write empty parentheses:
main(void) {
// same as main()
...
}
Generic Pointers
Pointers can be declared as
void, meaning that they can point to any type. These
pointers are sometimes called generic.
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- C Compiler for Microchip PIC microcontrollers
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