Strange C++ Memory Allocation

Question

I created a simple class, Storer, in C++, playing with memory allocation. It contains six field variables, all of which are assigned in the constructor:

int x;
int y;
int z;
char c;
long l;
double d;

I was interested in how these variables were being stored, so I wrote the following code:

Storer *s=new Storer(5,4,3,'a',5280,1.5465);
cout<<(long)s<<endl<<endl;
cout<<(long)&(s->x)<<endl;
cout<<(long)&(s->y)<<endl;
cout<<(long)&(s->z)<<endl;
cout<<(long)&(s->c)<<endl;
cout<<(long)&(s->l)<<endl;
cout<<(long)&(s->d)<<endl;

I was very interested in the output:

33386512

33386512
33386516
33386520
33386524
33386528
33386536

Why is the char c taking up four bytes? sizeof(char) returns, of course, 1, so why is the program allocating more memory than it needs? This is confirmed that too much memory is being allocated with the following code:

cout<<sizeof(s->c)<<endl;
cout<<sizeof(Storer)<<endl;
cout<<sizeof(int)+sizeof(int)+sizeof(int)+sizeof(char)+sizeof(long)+sizeof(double)<<endl;

which prints:

1
32
29

confirming that, indeed, 3 bytes are being allocated needlessly. Can anyone explain to me why this is happening? Thanks.