how to delete the array in c++

[karthigeyantp]

hi, i have declared array at 1st ,in middel of the program i want to delete the array how to do it.

[arnaudk]

Like this:

a = new int[5]; // Declare an array
delete [] a;   // Delete an array
a = 0;      // Clear a to prevent using invalid memory reference
 

If you declared it on the stack: int a[5], you can not delete it; its memory will be freed when it falls out of scope. Read this.

[karthigeyantp]

Like this:

a = new int[5]; // Declare an array
delete [] a;   // Delete an array
a = 0;      // Clear a to prevent using invalid memory reference
 

If you declared it on the stack: int a[5], you can not delete it; its memory will be freed when it falls out of scope. Read this.

i have decleared it in this way position = new int [300]
it is displaying undecleard position. what is wrong?..

[arnaudk]

You are assigning something to position without having declared it yet. Since position is a pointer to an int, you should declare it as such before using it: int * position;
If a is not declared yet, line 1 should read: int * a = new int[5];