![4) Arrays start at 0 rather than 1.
Most people start counting at 1, rather than zero. Compiler writers
start with zero because we're used to thinking in terms of offsets.
This is sometimes tough on non-compiler-writers; although a[100]
appears in the definition of an array, we would better not store any
data at a[100], since a[0] to a[99] is the extent of the array.
5) No nested functions.
Function contained inside another function is known
as nested function. This simplifies the
compiler and slightly speeds up the runtime
organization of C programs.](https://image.slidesharecdn.com/clanguagemythsecrets-180314142104/85/C-language-myths-secrets-13-320.jpg)
C language myths & secrets
- 1. C language Myth & Secrets. By, Ankush Mundhra BCA II year
- 2. Contents Introduction History of C • Its early development • K&R C • C language standards Myths & Secrets Experiment Q & A
- 3. Introduction What is C language ? C is a high-level and general purpose programming language that is ideal for developing firmware or portable applications. Originally intended for writing system software, C was developed at Bell Labs by Dennis Ritchie for the Unix Operating System (OS) in the early 1970s.
- 4. of C language - Simple Portability Powerful Case sensitive Modularity Use of Pointers
- 5. History of C language Its early developments - C language was invented for implementing UNIX operating system. The C programming language is a structure oriented programming language, developed at Bell Laboratories in 1972 by Dennis Ritchie. C programming language features were derived from an earlier language called “B” (Basic Combined Programming Language – BCPL). Ken Thompson & Dennis Ritchie
- 6. K&R C - In 1978, Brian Kernighan and Dennis Ritchie published the first edition of ”The C Programming Language”. This book, known to C programmers as "K&R", served for many years as an informal specification of the language. K&R introduced several language features: Standard I/O library Long int data type Unsigned int data type In the years following the publication of K&R C, several features were added to the language, supported by compilers from AT&T and some other vendors. These included: Void functions Assignment for struct data types Enumerated types Functions returning struct or union types
- 7. C Language Standards - • C89/C90 standard – First standardized specification for C language was developed by the American National Standards Institute in 1989. C89 and C90 standards refer to the same programming language. • C99 standard – Next revision was published in 1999 that introduced new features like advanced data types and other changes.
- 8. C11 AND EMBEDDED C LANGUAGE – • C11 standard adds new features to C programming language and library like type generic macros, anonymous structures, improved Unicode support, atomic operations, multi- threading and bounds-checked functions. It also makes some portions of the existing C99 library optional and improves compatibility with C++. • Embedded C includes features not available in C like fixed- point arithmetic, named address spaces, and basic I/O hardware addressing. • Operating systems, C compiler and all UNIX application programs are written in C language • It is also called as procedure oriented programming language. The C language is reliable, simple and easy to use. C has been coded in assembly language.
- 9. Myths & Secrets “ C is quirky, flawed, and an enormous success.” - Dennis Ritchie
- 10. 1) C is obsolete. No one uses C anymore! It is true that C is the Latin of programming languages and that recent languages are more flexible and let us do amazing stuff with ease. However, most of these languages have emerged from C. They have been built with C as their base.
- 11. 2) C++ is better than C. There are two versions of everything these days, exactly like C and C++. C is like the 5-inch version of a smartphone and C++ is its 6-inch variant. Both pack almost same features with a few modifications here and there. Whatever you achieve with C, you can achieve with C++. Similarly, whatever you can make in C++, you can also make that with C.
- 12. 3) C++ is the next version of C! People say C++ is the next version of C, which technically it is NOT, not even close! The term “version” comes into picture when we are dealing with the same thing, for example, Windows 8, Windows 8.1 and so on. In the case of C and C++, they are two different languages. It’s true that they are built on the same base, but they can’t technically be called “versions” as such.
- 13. 4) Arrays start at 0 rather than 1. Most people start counting at 1, rather than zero. Compiler writers start with zero because we're used to thinking in terms of offsets. This is sometimes tough on non-compiler-writers; although a[100] appears in the definition of an array, we would better not store any data at a[100], since a[0] to a[99] is the extent of the array. 5) No nested functions. Function contained inside another function is known as nested function. This simplifies the compiler and slightly speeds up the runtime organization of C programs.
- 14. Experiments 1) Difference in data types sizes in GCC and in Turbo compiler. Here is the code - #include<stdio.h> int main() { int *p; printf("%dn", sizeof(int)); printf("%dn", sizeof(char)); printf("%dn", sizeof(float)); printf("%dn", sizeof(double)); printf("%dn", sizeof(p)); return 0; }
- 15. After Compiling the above code, Here is the output - GCC Compiler Turbo C Compiler
- 16. 2. Difference in output in Increment Decrement operator. Here is the code - #include<stdio.h> int main() { int i=5; printf("%d%d%d%d%d",i++,i--,++i,--i,i); return 0; }
- 17. After Compiling the above code, Here is the output - GCC Compiler Turbo C Compiler
- 18. Reference Wikipedia Google Quora Arihant All-in-One Computer Science book Bibhudendu Panda Sir