Steps for c program execution

Steps for c program execution

• 1.
  Steps for C Program Execution
• 2.
  Basic Steps ofexecution Creating the program Compiling the program Link the program with functions that are needed from c library Executing the program
• 3.
  Flow of execution
• 4.
  Editor or IDE IDE— that's an integrated development environment, it is the piece of software that acts as text editor, debugger and compiler all in one. Example: Eclipse NetBeans CodeLite Bloodshed Dev-C++ Code::Blocks C-Free
• 5.
  Preprocessor The C Preprocessoris not a part of the compiler, but is a separate step in the compilation process. In simple terms, a C Preprocessor is just a text substitution tool and it instructs the compiler to do required pre-processing before the actual compilation. We'll refer to the C Preprocessor as CPP. Preprocessors Examples #define MAX_ARRAY_LENGTH 20 #include <stdio.h> #include "myheader.h“ #define square(x) ((x) * (x))
• 6.
  Compiler A compiler isa software program that transforms high-level source code that is written by a developer in a high-level programming language into a low level object code (binary code) in machine language, which can be understood by the processor. A compiler translates the code written in one language to some other language without changing the meaning of the program. Example: GCC Compiler Special type of compilers source-to-source compiler Bytecode compilers or Warren Abstract Machine (or WAM). Just-in-time compiler (JIT compiler)
• 7.
  Linker In high levellanguages, some built in header files or libraries are stored. These libraries are predefined and these contain basic functions which are essential for executing the program. These functions are linked to the libraries by a program called Linker. If linker does not find a library of a function then it informs to compiler and then compiler generates an error. The compiler automatically invokes the linker as the last step in compiling a program. it also links the user defined functions to the user defined libraries. Usually a longer program is divided into smaller subprograms called modules. And these modules must be combined to execute the program. The process of combining the modules is done by the linker.
• 8.
  Loader Loader is aprogram that loads machine codes of a program into the system memory. In Computing, a loader is the part of an Operating System that is responsible for loading programs. It is one of the essential stages in the process of starting a program. Because it places programs into memory and prepares them for execution. Loading a program involves reading the contents of executable file into memory. Once loading is complete, the operating system starts the program by passing control to the loaded program code. All operating systems that support program loading have loaders. In many operating systems the loader is permanently resident in memory.
• 9.
  CPU CPU (pronounced asseparate letters) is the abbreviation for central processing unit. Sometimes referred to simply as the central processor, but more commonly called processor, the CPU is the brains of the computer where most calculations take place. In terms of computing power, the CPU is the most important element of a computer system. A central processing unit (CPU) is the electronic circuitry within a computer that carries out the instructions of a computer program by performing the basic arithmetic, logical, control and input/output (I/O) operations specified by the instructions. In anotther way we can say A Central Processing Unit, or CPU, is the piece of hardware in a computer that carries out computer programs by performing arithmetical and logical operations. The CPU of a modern computer is contained on a single chip called a microprocessor. Some computers have more than one CPU, a development known as microprocessing.
• 10.
  Compilation steps ofGCC compiler
• 11.
  Assembler A computer willnot understand any program written in a language, other than its machine language. The programs written in other languages must be translated into the machine language. Such translation is performed with the help of software. A program which translates an assembly language program into a machine language program is called an assembler. If an assembler which runs on a computer and produces the machine codes for the same computer then it is called self assembler or resident assembler. If an assembler that runs on a computer and produces the machine codes for other computer then it is called Cross Assembler.
• 12.
  For more help Ifyou want to know details about IDE, PREPROCESSOR, COMPILER, LINKER, LOADER, ASSEMBLER, and CPU go to the individual video
• 13.
  Thank You