1. DEPARTMENT OF COMPUTER SCIENCE & APPLICATION
BILASPUR UNIVERSITY
DEPARTMENT OF COMPUTER SCIENCE & APPLICATION
TOPIC :- STRINGS
GUIDED BY: PRESENTED BY:-
Mr.Jitendra kumar Ritu singh

2. Strings
A special kind of array is an array of characters ending in the null character \0 called string arrays
A string is declared as an array of characters
char s[10]
char p[30]
When declaring a string don’t forget to leave a space for the null character which is also known as the string terminator character

3. Standard library string function
strcpy - copy one string into another.
strcat - append one string onto the right side of the other.
strrev – reverses string.

4. strcpy strcpy(destinationstring, sourcestring)
Copies sourcestring into destinationstring
For example
strcpy(str, “hello world”); assigns “hello world” to the string str

5. strcpy example #include <stdio.h> #include <string.h>
Int main() {
Char source[ ] = “RITU”;
Char target [10];
Strcpy( target , source);
Printf(“source string = %s\n”,source);
Printf(“target string = %s\n”,target);
Return 0; }

6. Usre difine function #include<stdio.h> #include<conio.h>
Char mystrcpy( char *t, char *s) {
While(*s != ‘\0’)
*t = *s;
s++;
t++; }
Return *t ;
Void main()
Char source [ ] = “ ram “ ;
Char target [ 6 ] ;
mystrcpy( target , source );
Printf(“\n source string = %s ,\n target string = %s “, source,target);
Out put :-= source string = ram
target string = ram

7. strcat strcat(destinationstring, sourcestring)
appends sourcestring to right hand side of destinationstring
For example if str had value “a big ”
strcat(str, “hello world”); appends “hello world” to the string “a big ” to get
“ a big hello world”

8. Library function #include <stdio.h> #include <string.h>
void main() {
Char source [ ] = “ RITU”;
Char target [10] = “SINGH”;
Strcat ( target,source);
Printf (“ source string = %s\n”,source);
printf(“target string = %s\n”,target); }
Out put :-
source string =RITU
target string = SINGHRITU

9. #include<stdio.h>
#include<conio.h>
char mystrcat( char *t, char *s) {
While( *t != ‘\0’)
t++; }
While(*s!=‘\0’)
*t = * s ;
s++;
target =‘\0’;
return target ;
void main()
str1[ ] = “ hello”;
Str2 [ 10] =“simple”;
mystrcat(str1,str2);
Printf(“ %s %s “, str1,str2);

10. THANK YOU