It is a pointer to function that returns int* and accepts int* and pointer to function that returns int* (and accepts undefined number of parameters; see comments).
-2 int() is the constructor of class int. It will initialise your variable a to the default value of an integer, i.e. 0. Even if you don't call the constructor explicitly, the default constructor, i.e. int() , is implicitly called to initialise the variable. Otherwise there will be a garbage value in the variable.
That second memory address, then, is expected to hold an int. Do note that, while you are declaring a pointer to an int, the actual int is not allocated. So it is valid to say int *i = 23, which is saying "I have a variable and I want it to point to memory address 23 which will contain an int."
int* i, int * i, int*i, and int *i are all exactly equivalent. This stems from the C compiler (and it's compatible C like systems) ignoring white space in token stream generated during the process of parsing the source code.
The internal representation of int and unsigned int is the same. Therefore, when you pass the same format string to printf it will be printed as the same. However, there are differences when you compare them. Consider: This can be also a caveat, because when comparing signed and unsigned integer one of them will be implicitly casted to match ...
64 I prefer int* i because i has the type "pointer to an int", and I feel this makes it uniform with the type system. Of course, the well-known behavior comes in, when trying to define multiple pointers on one line (namely, the asterisk need to be put before each variable name to declare a pointer), but I simply don't declare pointers this way.
For example, when you cast a pointer to an int. perform a conversion as part of the cast operation. For example, when casting a float to an int, the data is actually transformed from the form used to represent floating point values (usually an exponent/mantissa form) to a plain old integer (with any fractional part lost)
int array[] = new int[10]; ? Both do work, and the result is exactly the same. Which one is quicker or better? Is there a style guide which recommends one?
