Skip to main content

History of C language

By
The C language was developed at AT & T (American Telegraph & Telephone)  Bell Laboratories in the early 1972's by a system programmer named Dennis Ritchie. It was written originally for programming under an operating system called UNIX which itself was later rewritten almost entirely in C. Its name encrypted as C, derives from the fact that it is based on an earlier version written by Ken Thompson, another Bell laboratories system engineer. He adapted it from a language that was known by the initials BCPL (Basic Combined Programming Language). Thompson derived his programming language name as B, the first of the initials BCPL. When the language was modified and improved to its present state, the second letter of BCPL, C was given to it. The C language is often described as a middle level language. It permits programs to be written in much the same style as that of most of high-level programming language. It also interacts with the inner workings of the computer. The American National Standards Institute (ANSI) has established certain standards for C which is known as ANSI C in addition to the original version of C developed by Dennis Ritchie. The another popular version of C is Turbo C.

Comments

Post a Comment

Popular posts from this blog

Passing arrays to functions in C programming

By
Like any other variables, we can also pass entire array to a function. An array name can be named as an argument for the prototype declaration and in function header. When we call the function no need to subscript or square brackets. When we pass array that pass as a call by reference because the array name is address for that array. /* Program to illustrate passing array to function */ #include<stdio.h> void display(int) ; /* function prototype */ main( ) { int num[5] = {100, 20, 40, 15, 33, i ; clrscr( ) ; printf (“\n The content of array is \n”) ; for (i=0; i<5; i++) display (num[i]) ; /*Pass array element fo fun */ getch{ } ; } void display(int n) { printf (“\t%d”, n ) ; } Output:     The content of array is 100      20       40       15 3 /* Program to read 10 numbers from keyboard to store these num into array and then c...
Post a Comment
Read more

CPU (Central Processing Unit)

By
PGA reffered as pin grid array in which pins of CPU are lined up in a straight format. SPGA referred as staggered pin grid array. in which pins of CPU are arranged staggered format. LGA reffered to as Land Grid Array in which pins are available within inside the socket but not in the CPU in other words in line grid array, in CPU ther are no pinsbut insteadpins areattached with in a socket which contact with with the CPU. for e.g. LGA775 socket(no pins on cpu) has better cooling system. better contact and better locking(climbing). LGA1155: Letest generation I socket, also reffered as sandy bridge, Turbo boost overclocking. More resent than LGA 1156 socket. LGA1156: ability to north bridge Doul channel DDR3 optional integreted graphics PCI express LGA1366: hi end core i series socket integreted tiple channal memmory controller external control bridge(HUB) Upgrading CPU: need to check its core suppert check multiprocessor supports or not check on the ...
Post a Comment
Read more

Recursive Function in C programming

By
             If a statement within the body of a function calls the same function, the function is called recursive function. Actually, recursion is a process by which a function calls itself repeatedly until some specified condition has been satisfied. This process is used for repetitive computations in which each action is stated in term of previous result. Many iterative or repetitive problems can be written in this form.                To solve a problem using recursive method, two conditions must be satisfied. They are: 1)       Problem could be written or defined in term of its previous result. 2)       Problem statement must include a stopping condition. /*   An example of recursive function to calculate factorial of a number.*/    #include<stdio.h>    #include<conio.h...
Post a Comment
Read more