C Pointers – Part 2 J.E.Jones OSU CSE 2421 OSU CSE 2421 Arrays and pointers ◦ Statically allocated arrays ◦ Dynamically allocated arrays Pointers to void (void *) Dynamic memory allocation and pointers Freeing (deallocating) dynamically allocated storage Pointer arithmetic Function parameters and pointers J. E. Jones OSU CSE […]
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orced version 1.0, by vivisimo, and posted in http://library.nu last modified: 2011.06.05 1 A Quick Start 1.1 Introduction It is always difficult to start describing a programming language because little details do not make much sense until one knows enough to understand the big picture. In this chapter, I try to give you a glimpse
CSE2421 Lab 1 PROBLEM Getting to know LINUX, your choice of editor and the debugger tool Due: Saturday, September 5th, 11:30 p.m. 10 Bonus Points (i.e.10% bonus) awarded if correctly submitted by Friday, September 4th, noon Determination of whether or not you have met the due date will be via the timestamp indicated within Carmen.
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OSU CSE 2421 Required Reading: Pointers On C, Chapter 13, Sections 13.2 through 13.3 J.E.Jones OSU CSE 2421 We’ve seen pointers to simple types before, e.g.: int *ptr1; float *ptr2; char *ptr3; We also saw examples of pointers to pointers (these can be used as pointers to arrays, for example): float **sets_ptr; /*
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J.E.Jones OSU CSE 2421 OSU CSE 2421 • C is procedural, not object-oriented • C is fully compiled (to machine code), not to byte-code • C allows direct manipulation of memory (via pointers) • C does not have garbage collection; the software writer has to do explicit memory management when it is required, and failure
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OSU CSE 2421 Required Reading: Pointers On C, Chapter 3, Sections 3.5 through 3.10 with a special interest in Table 3.4. J.E.Jones OSU CSE 2421 When programming in any language, it is usually important to know what type of memory holds your data ◦ Stack ◦ Heap ◦ Disk ◦ Read-Only Memory, etc.
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OSU CSE 2421 Required Reading: Pointers On C, Chapter 10, through Section 10.3 J.E.Jones OSU CSE 2421 • Recall that ANSI C has a set of default data types: char, int, long, float, double. • An aggregate data type is one that can hold more than one individual piece of data at a time. •
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OSU CSE 2421 Required reading: Pointers on C, Chapter 9 through 9.4, 9.11 and 9.12 J.E.Jones OSU CSE 2421 ANSI C does not have a string data type. In ANSI C, strings are stored as sequences of ASCII characters in memory declared as an array of char data type values (i.e. a character
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OSU CSE 2421 The C Language – Logical vs Bitwise Operations;Bit Shifting;Casting;Short-Circuit Required Reading: Computer Systems: A Programmer’s Perspective, 3rd Edition, Chapter 2 thru Section 2.1.2 J.E.Jones OSU CSE 2421 > right-shift & bitwise AND | bitwise OR ^ bitwise exclusive-OR ~ bitwise NOT (complement, not negation) Bitwise operators 0 is 0 && logical
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OSU CSE 2421 Required Reading: Computer Systems: A Programmer’s Perspective, 3rd Edition, Chapter 1 thru Section 1.3 Pointers on C, Chapter 5 thru Section 5.1.3, 5.3 through the end of the chapter J.E.Jones OSU CSE 2421 Libraries (e.g. printf() code) Assembler hello.c Type in program source code (file.c) using an editor of your choice; plain
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