Data structure and c K.S. Prabhu Letterer All Deaf Educational Technology

Introduction in c C program made by ken Thompson and Dennis Ritchie in Developed by martin Richards. Although C was designed for implementing System Software. It is also widely used for developing portable Application Software.

ken Thompson and Dennis Ritchie

Means C program mean compiler programming C is a Program language. It is a middle level language This programming language is designed to help as Data process. Data process is numbers, characters and strings. Its provide use of output display

C Program logo and Code

The Character Set in C 1)Upper case alphabets: It is capital word alphabets Example: A B C D E …….Z

Sample code Program #include power(int*m,int*n); void main() { int X,Y; clrscr(); printf("Enter number:"); scanf("%d",&X); fflush(stdin); printf("Enter power to raise to:"); scanf("%d",&Y); fflush(stdin); power(&X,&Y); …………….. ……………… ………………. getch();

2) Lower case alphabets: It is small word through called by lower case alphabets Example: a b c d e……..z

Sample Code Program #include power(int*m,int*n); void main() { int x,y; clrscr(); printf("Enter number:"); scanf("%d",&x); fflush(stdin); printf("Enter power to raise to:"); scanf("%d",&y); fflush(stdin); power(&x,&y); …………….. ……………… ………………. getch(); }

3) Numbered or digital characters: It means also used by number or Ditital characters. Example:

Sample code Program #include void main() { int a,b; char cmd[25]; ………. } #include void main() { char name[21],addrs[31]; clrscr(); puts("Enter your Name to a maximum of 20 characters"); puts("Enter your Address to a maximum of 30 characters"); …… }

4) Arithmetic Operators: It means arithmetic program through operated by arithmetic operators. Example: +, %, *, - Plus,Division,Multiple and Minus

Sample Code Program #include sum(int a,int b); void main() { int x,y,value; scanf("%d%d",&x,&y); value=sum(x,y); printf("Total is %d\n",value); } sum(int a,int b) { return a+b; } OUTPUT Output:: 5 3 Total is 8

5) Relational Operators: It is numberic and case character relation operated by relational operators. Syntax:-,, =, = Less and Great, Less Equal Great,Equal Example Example: 4>5,6<4,4=4

Sample Code Program #include void main() { int I,sum,num; clrscr(); sum=num=0; for(I=0;I<8;I=I+1) { …….. if(num<=0) getch(); }

6) curly brace: Syntax:- { } { → Starting curely space } → Ending curely space Example: {……………………}

Sample Code Program {  Head of curly ………….. {  Sub of curly ………….. }  Sub End of curly ………. getch(); }  Head End of Curly

7) Square braces: Syntax:- [ ] Example: Float [4] ; String [9] ;

Sample Code program #include void main() { char str1[101],str2[101]; int diff,I=0; clrscr(); ……….. getch(); }

8) Parenthèses braces :- Syntax:- ( ) Example: Print (………) Scant (………)

Sample Code program Program:: #include void main() { char in_str[21]; clrscr(); puts("Enter a string to a maximum of 20 characters"); gets(in_str); fflush(stdin); puts(in_str); getch(); }

9)Special characters: It mean other syntax characters Syntax:- &, !, #, ?, ~, ^, $, |,:,;.

Sample code program #include void main() { char yn; clrscr(); do { puts("enter y/n(yes/no)"); yn=getchar(); fflush(stdin); if(yn!='y'&&yn!='n') puts("invalid input"); } while(yn!='y'&&yn!='n'); getch(); }

Special Character: