off set in structure or class size.

How the off set are set while allocating memory.
calss A()
{
public:
char a[10];
char b[2];
float c;
};


calss B()
{
public:
char a[10];
float c;
char b[2];
};

int aa=sizeof(A)// returns 16 bytes
int aa=sizeof(B)// returns 20 bytes

how the offsets are defined in structure and classes.

Thanks.

It's dependent on the compiler that you use. It's rarely relevant, anyway.

Its configured by the "struct member alignment" settings. Search for this topic if you need more information.

Thanks mwilliamson
I got it .