C/C++用new、delete分配回收堆中空间

int *CreateList() 10 { 11     int a[5]; 12     int *a = new int[5]; 13     delete[] a; 14      15     int a(5); 16     int a = 5; 17     int *a = new int(5); 18     delete a; 19     return a; 20 }