Given the declarations below, write a code fragment that allocates a nameless variable for pointer p1 to point to.
```
int *p1, *p2;
```
```
p1 = new int;
```
Pointer p1 can be used to refer to a variable, so we can use the operator new to create variables that have no identifiers to serve as name, they have only addresses. We assign the address to the pointer variable p1.
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