lights are required to be installed on every trailer
Company nammed TP4
www.atsdr.cdc.gov/toxprofiles/tp4-c4.pdf Go to that site ok it shows the chemical properties of Beryllium chloride.
Pointers were always difficult subject to understand. I would suggest to read several tutorials and spend some time playing with them. Explanation: /* create array of two pointers to integer */ int *aaa[2]; /* setting first pointer in array to point to 0x1212 location in memory */ aaa[0] = (int *)0x1212; /* allocate memory for the second pointer and set value */ aaa[1] = malloc(sizeof(int)); *aaa[1] = 333; /* if you want to can make first item to point to the second, now arr[0] pointer address changed to the same as aaa[1] pointer */ aaa[0] = aaa[1]; /* print aaa[1] address and later print value */ printf("LOCATION: %X\n", (unsigned int)*(aaa + 1)); printf("VALUE: %d\n", **(aaa + 1)); /* exact the same here, but different way of how I wrote pointers */ printf("LOCATION: %X\n", (unsigned int)aaa[1]); printf("VALUE: %d\n", *aaa[1]); If you would do the same with 0 element of array, which points to 0x1212 memory location you would get some kind of number or Bus error if you accessed restricted memory place (for example the beginning of memory). I hope this I did not make you more confused than you are.