C - Introduction

C Language

Introduction

Fill in the blanks

        1.   Who is the author of C   Dennis Ritchie

        2.    C language is developed from B language

        3.   C language is Middle level language

        4.   C uses Operating system

        5.   Which year was C language invented 1970

        6.   Which year was C language is Released 1972

        7.   Int byte value  2

        8.   Long int byte value 4

        9.   Float byte value 4

        10.                     Char byte value 1

        11.                     Double byte value 8

        12.                     Char a[5]=”Mango”.string byte value 5

        13.                     Write single line comment   //

        14.                     Write multiline comment /*    */

        15.                     Write a escape sequence for new line  \n

        16.                     Scanf used to print the value [T/F].  False

        17.                     Printf used to store the value[T/F].  True

        18.                     Write a escape sequence for tab space   \t

        19.                     Write a comment to printing a float 2 presicion                             %0.2f

        20.                     Write a symbol for preprocessor  #

    

            Answer the following Question

 

1.   Write  C language history, Features , Characteristics and uses.

C Languge History:

·         C Language author (Dennis Ritchie)

·         C is Developed for operating   system- os(windows,linux,unix)

·         C author is Dennis Ritchie - 1970

·         C language    published on 1972

·         C language developed from    B Language ,BCPL(Basic Computer Programming language).

·         ANSI -   American National standard Institute  -1983

·         in advanced version of c released -1989

·         first copy is Released on 1990

Features’ Of  C :

*Modularity
 *Code Reusability
 * Limited Number of Keyword
 * Portability
 * Ability to Extend Itself

Characteristics of c:

*c- Structure (OR) procedure oriented language

*c-  case sensitive

*c- top down approach

*Small Size (memory)

*Structured Language

*It has high level construct

*It can handle low level activities

*It can be compiled on a variety of computer

USES OF C:

*Operating System

*Editors (Note pad, word pad, ms office)

*File utilities

*Compile

*Performance Enhancer

2.   Write a Runtime Program.

#include <stdio.h>

#include <conio.h>

main()

{

int a;

clrscr();

printf(“enter a and b value”);

scanf(“%d%d” &a,&b);

printf(“a value=%d\n b value=%d”,a,b);

getch();

}

3.   To Print your name using String.

#include <stdio.h>

#include <conio.h>

main()

{

char a[20];

clrscr();

printf(“enter your name”);

scanf(“%s” &a);

printf(“your name=%s”,a);

getch();

}

4.   Write a Program to convert lower case to upper case and Upper case to lower case.

Lower case to Upper case

#include <stdio.h>

#include <conio.h>

main()

{

char a;

clrscr();

printf(“enter any character”);

scanf(“%c” &a);

printf(“Upper case=%c”,a-32);

getch();

}

Upper case to Lower case

#include <stdio.h>

#include <conio.h>

main()

{

char a;

clrscr();

printf(“enter any character”);

scanf(“%c” &a);

printf(“Lower case=%c”,a+32);

getch();

}

 

5.   Write a program for below Equation.

A=πr²

π=3.14

 r=1.5

#include <stdio.h>

#include <conio.h>

main()

{

float r,A;

clrscr();

printf(“enter radius value”);

scanf(“%f”, &r);

A=3.14*r*r;

printf(“Area=%d”,A);

getch();

}

6.   Write a program for below Equation.

A=2πr

π=3.14

r=7

#include <stdio.h>

#include <conio.h>

main()

{

int r,A;

clrscr();

printf(“enter radius value”);

scanf(“%d”, &r);

A=2*3.14*r;

printf(“Area=%d”,A);

getch();

}

7.   Write a program for below Equation

T=(X+Y)/2

X=3

Y=9

 #include <stdio.h>

#include <conio.h>

main()

{

int  X=3,Y=9,T;

clrscr();

T=(X+Y)/2;

printf(“Total=%d”,T);

getch();

}