文件名称:
N.Parlante(Stanford2000)指针与内存
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文件大小: 69kb
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上传时间: 2011-05-22
详细说明： 斯坦福大学的学习资料 Pointers — Before and After There's a lot of nice, tidy code you can write without knowing about pointers. But once you learn to use the power of pointers, you can never go back. There are too many things that can only be done with pointers. But with increased power comes increased responsibility. Pointers allow new and more ugly types of bugs, and pointer bugs can crash in random ways which makes them more difficult to debug. Nonetheless, even with their problems, pointers are an irresistibly powerful programming con struct. (The following explanation uses the C language syntax where a syntax is required; there is a discussion of Java at the section.) Why Have Pointers? Pointers solve two common software problems. First, pointers allow different sections of code to share information easily. You can get the same effect by copying information back and forth, but pointers solve the problem better. Second, pointers enable complex "linked" data structures like linked lists and binary trees. What Is A Pointer? Simple int and float variables operate pretty intuitively. An int variable is like a box which can store a single int value such as 42. In a drawing, a simple variable is a box with its current value drawn inside. ...展开收缩
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