it is not printing the right values

main()
{

int *ptr;
int *p;
p=ptr;
int i;
ptr = malloc (10);

for (i =0;i<10;i++)
ptr[i++] = 2;

for (i =0;i<10;i++)
printf("%d\n",p[i]);
}


the output is something like this

0
4096
132617
-1075507061
4
12643904
3
100
0
2