The Waite Group's C++ Primer Plus, Third Edition

Chapter 3

A1:	Having more than one integer type lets you choose the type best suited to a particular need. For example, you could use short to conserve space, long to guarantee storage capacity, or find that a particular type speeds up a particular calculation.
A2:	short rbis = 80; // or short int rbis = 80; unsigned int q = 42110; // or unsigned q = 42110; unsigned long ants = 3000000000; Note Don't count on int being large enough to hold 3000000000.
A3:	C++ provides no safeguards to keep you from exceeding integer limits.
A4:	The constant 33L is type long, whereas the constant 33 is type int.
A5:	The two statements are not really equivalent, although they have the same effect on some systems. Most important, the first statement assigns the letter ...