Define and initialize this data type in C programming
Can anyone tell me if this is the correct definition of this data type, and if the way I initialized is correct?
typedef int const * (* const DataOne)(const int *);
=> The above datatype shows a constant pointer to a function that takes a pointer to a constant int
as a parameter and returns a pointer to a constant int
.
=> initialized and declared: DataOne = &myFunction(7);
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typedef int const * (* const DataOne)(const int *);
=> the above datatype shows a constant pointer to a function that takes a pointer to an int constant as a parameter and returns a pointer to an int constant.
Right.
=> initialized and declared: DataOne = & myFunction (7);
Wrong. A function pointer assignment cannot be performed on a function call (i.e. you cannot have actual arguments for parameters). Also, DataOne is a type, not a variable. So it should look something like this:
int const * myFunction(const int*);
DataOne myPointer = myFunction; // &myFunction would also work
Declare an equivalent function pointer without a type:
int const * myFunction(const int*);
int const * (* const functionPointer)(const int *) = myFunction;
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