Int* means to define a variable of type Int*, that is, a pointer variable of type int.

Int stands for basic data type (integer);

* Represents a pointer operator.

Examples are as follows:

int？ a[]={ 1，2，3，4，5 }； //? Define an array of type int, which contains 5 elements.

int*？ p2 = a； ? //? Define an int pointer variable p 1 to point to the first address of array a.

int*？ p2 =(int *)malloc(sizeof(int))； ? //? Define an int pointer variable p2, which points to an address unit with four consecutive bytes in memory.