The character char occupies 1 byte, ranging from-128 to 127. The two bytes of the integer int, ranging from -32768 to 32767, are all within the range of int, so' a'-32 can be expressed as 65 or' a'. Actually, it can be expressed as' a'. You are studying C now! I got full marks in the exam last semester. I think the most important thing is to learn how to store data and pointers in memory. I hope it helps you.