1. This document discusses various aspects of strings in the C programming language including: 2. It describes common string functions like strlen(), strcpy(), gets(), puts() and strcmp() that are declared in the string.h header file and how to use them to manipulate strings. 3. Examples are provided showing how to define strings, copy strings, get user input as strings, print strings, and compare strings in C programs.

1. H C
10:
.
1. char
2. O ASCII
3. char
.
1.
2. !
3. gets puts
4. " # string.h
$.
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1. ! " # # $ char
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( !
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.

2. A.
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0"% " # " printf & " # # $ % %c.
) " "* :
char ch;
ch=97;
ch='a';
printf("%c",ch);
A.
3. * " char
'! " #
/ . " & " # % "$ " %,
" & C
/* char.c */
#include <stdio.h>
main()
{
char c;
for (c=80; c<=100; c++)
{
printf("nO xaraktiras %d einai %c",c,c);
}
}
* & "$ ASCII 128-255 " " # * c
unsigned char.
2.
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" # & «hello» " $ . :
char str[20];
str[0] str[1] str[2] str[3]
…
str[4] str[5]
h e l l o 0
str[20]
2.
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# % , # " " " " ( " (
)
char pin[3]={'a','b','0'};
char pin[3]="ab";
char *pin="ab"; char pin[]="ab";

3. 2.
2. 0 "$ %
*! " #
"$ ( printf) & $ ( scanf)
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% % "% $ , ( % "% ,
% # % # . .
) scanf # " " & .
" # & # * % :
/ "$ &% :
0 * # &% :
char string[100];
printf("%s",string);
scanf("%s",string);
2.
2. 0 "$ %
! " #
/ . " & & % # " *
«teststring» " «test string» (" * $ % )
# % " .
/* string.c: Deixnei tin xrisi tis scanf kai tis printf me
simvoloseires */
#include <stdio.h>
main()
{
char string[80];
printf("Dwste mia simboloseira: ");
scanf("%s",string);
printf("Pliktrologisate tin simvoloseira: %s",string);
}
2.
3. ! gets puts
! " #
' & % scanf, # , "
& & " & " * " & .
" " & ( , "
gets " " $ " :
4 " string "
# , " , " . 0%
:
%# %, puts " "*
" # $ " ‘n’:
"% %
char *gets(char *string)
int puts(char *string)
stdio.h
stdio.h
2.
4. 4 string.h
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0" # # % * % # # % C, % %
, :
" % %, " " " . & % * .
0 % %, "$ :
4 " % & ( src dest.
+ :
" ( " $ $ string.
5 # "
string.h
int strlen(char *string)
void strcpy(char *dest, char *src)

4. .
1.
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.
+ % " $ " int mystrlen(char *s) " # $ %
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4 int strlen(char *s) " % string.h % * & "
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.
2. & ( *
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4 char *strcpy(char *dest, char *src) " % string.h % *
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.
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& % ( % "* "
6" # %. :
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( % , " % %. "* %
"% ASCII & # % " % %.
" ( % " gets scanf & " & .
.
4. ( " % 0. #
'! " #
% 2 " $ "% ASCII (128-255) " "
" # " & " " % " % .
" & "* ( ,% " ):
Hello World!Hello World!

5. .
5. & *
(! " #
+ " & C " % :
7 # , # . ( " & " % &
" & )
7 " & " % ( & $ * "*
.
# & " :
Dwse tin 1i simvoloseira: test
Dwse tin 2i simvoloseira: abba
=====
Isxyei: abba < test
& " % int strcmp(char *s1, char *s2) string.h
" % "