1. The document discusses basic C programming concepts like data types, variables, functions, header files, and input/output functions. 2. It explains how a C source code file is compiled and linked to create an executable file. Key functions covered include printf() for output and scanf() for input. 3. The text also reviews common input and output functions like putchar(), getchar(), gets(), and puts() illustrating their use with examples. It demonstrates how characters and strings can be read from keyboard and displayed on screen in C programs.

2. (cos)
(Windows)
BCLP B
(Bell
Laboratoorics)
The C Programming Language
1988

3. (Source Program)
c work.c
2. (Compile)
(Build)
(Link)
printf()
.exe

4. (Header File)
main(
) h.
#include<header_name>
header_name
printf
#include <stdio.h>

5. (Main Function)
{ }
main( )
2.3
1.
{ } main {}
2.
3. (:)
4. 1 1 1

6. (identifier)
(address)

7. :
data_type
var
data
:
var_type
var name

8. 1
,

9. input
process
output
printf
:

10. :
String _format
%d
Address_list
& Ampersand
: expreeion
:
var

11. x
y
Printf “data x = “ scant “%&x :
Printf “data = “ scant “%&y :
2.
R = 2+3 * ;
S= 2+3 * ;
T= 2+3 * - ;
Printf “ r=x+y*2=%dn”,r :
Printf “ r= x+yX*2=5dn”,s :
Printf “ r=x+y*2-1 =%dn”,t :

12. 1 (char)
5.1 putchar ( ) 5.2 getchar ( )
5.3 getch ( ) 5.4 getche ( )
5. putcar ( )
1
Putchar_argument

13. 1. ‘A’ char
word1 „1‟ word2
char word1=„A‟ , word2=„1‟
2. 1
putchar(word1); putchar(word2);
A1
5.2 getchar ( )
1
Enter
1

14. 1.
Printf (“Key 1 Character=”) ;
Word = getchar ( ) ;
1 a
Enter
char word
2.
word a ( word)
Printf (“You key Character is =%cn”,word) ;
5.3 getch ( )
1
Enter
1
2
char_var

15. 1.
printf (“Key 1 Character =” ) ;
word = getch ( ) ;
1
a
Enter
2.
word a ( word)
printf (“Key 1 Character =%cn”,word ) ;
char word

16. 5.4 getche ( )
1
Enter
1
2
char_var

17. 1.
printf (“Key 1 Character =” ) ;
word = getcher ( ) ;
1 a
Enter
char word
2.
word a
word)
printf (“Key 1 Character =%cn”,word )
;

18. (String)
char[n]
6.1 puts()
1
string_argument

19. 1.
word
Char word [15] = “*Example*”;
2.
puts
Puts (word) ;
Puts (“*************”);
6.2 gets( )
Enter
1
2

20. 1.
Enter
gets
(word);
2.
printf (You name is = %sn”,word) ;