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دانلود کتاب آموزشی Understanding and Using C Pointers

نویسنده :Legend
تاریخ:پنجشنبه 2 خرداد 1392-07:28 ب.ظ

  مرجع دانلود کتاب های آموزشی | کتابخانه افسانه ای
سال : 2013
صفحه : 226
حجم : 7 MB
قالب : PDF
A solid understanding of pointers and the ability to effectively use them separates anovice C programmer from a more experienced one. Pointers pervade the language andprovide much of its flexibility. They provide important support for dynamic memoryallocation, are closely tied to array notation, and, when used to point to functions, addanother dimension to flow control in a program.

Pointers have long been a stumbling block in learning C. The basic concept of a pointeris simple: it is a variable that stores the address of a memory location. The concept,however, quickly becomes complicated when we start applying pointer operators andtry to discern their often cryptic notations. But this does not have to be the case. If westart simple and establish a firm foundation, then the advanced uses of pointers are nothard to follow and apply.

The key to comprehending pointers is understanding how memory is managed in a Cprogram. After all, pointers contain addresses in memory. If we don’t understand howmemory is organized and managed, it is difficult to understand how pointers work. Toaddress this concern, the organization of memory is illustrated whenever it is useful toexplain a pointer concept. Once you have a firm grasp of memory and the ways it canbe organized, understanding pointers becomes a lot easier.

This chapter presents an introduction to pointers, their operators, and how they interactwith memory. The first section examines how they are declared, the basic pointer oper‐ators, and the concept of null. There are various types of “nulls” supported by C so acareful examination of them can be enlightening.

The second section looks more closely at the various memory models you will un‐doubtedly encounter when working with C. The model used with a given compiler andoperating system environment affects how pointers are used. In addition, we closelyexamine various predefined types related to pointers and the memory modelsPointer operators are covered in more depth in the next section, including pointerarithmetic and pointer comparisons. The last section examines constants and pointers.The numerous declaration combinations offer many interesting and often very usefulpossibilities.

Whether you are a novice C programmer or an experienced programmer, this book willprovide you with a solid understanding of pointers and fill the gaps in your education.The experienced programmer will want to pick and choose the topics of interest. Thebeginning programmer should probably take a more deliberate approach.
  مرجع دانلود کتاب های آموزشی | کتابخانه افسانه ای
نویسنده : Richard Reese

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نوع مطلب : آموزش های C 
دنبالک ها: آموزش های C 

 
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