Aim:
To check given string is palindrome or not.
Program:
#include<stdio.h>
#include<string.h>
#include<conio.h>
void main ()
{
char str[80],revstr[80];
clrscr ( );
printf("\nEnter a string:");
scanf("%s",&str)
strcpy(revstr,str);
strrev(revstr);
if(!strcmp(str,revstr))
printf("\nGiven string '%s' is Palindrome",str);
else
printf("\nGiven string '%s' is not Palindrome",str);
}
Output:
Enter a string: medem
Given string 'medem' is Palindrome
Aim:
To find sub-string in a given string.
Program:
#include<stdio.h>
#include<conio.h>
void main ( )
{
int count=0,count2=0,i,j,flag;
char str[80],search[20];
clrscr();
printf("\n Enter a string:");
gets(str);
printf("\n Enter a sub-string:");
gets(search);
while( str[count] != '\0')
count++;
while( search[count2] != '\0')
count2++;
for(i=0;i<=count1-count2;i++)
{
for(j=i;j<i+count2;j++)
{
flag =1;
if( str[i] != search[j-i] )
{
flag = 0;
break;
}
}
if( flag == 1)
break;
}
if( flag == 1)
printf("\n SEARCH SUCCESSFUL");
else
printf("\n SEARCH NOT SUCCESSFUL");
}
Aim:
To check given string is Palindrome or not.
Program:
#include<stdio.h>
#include<conio.h>
void main ( )
{
char str[80],revstr[80];
int i,length=0,flag=0;
clrscr ();
printf("\n Enter a string:");
gets (str);
for( i=0;string[i] != '\0';i++)
{
length++;
}
printf("\nLength of the string \'%s'\ is : %d",str,length);
for(i=length-1;i>=0;i--)
{
revstr[length-i-1] = str[i];
}
for(i=0;i<length;i++)
{
if(revstr[i] == str[i])
flag = 1;
else
flag = 0;
}
if ( flag == 1)
printf("\n%s is a palindrome",str);
else
printf("\n%s is not a palindrome",str);
}
Aim:
To insert a substring into a string.
Program:
#include<stdio.h>
#include<conio.h>
#include<string.h>
void main()
{
char str[80],substr[20];
char X,newstr[80];
int pos,count1=0,count2=0,
int i=0,t=0,l;
clrscr ();
printf("Enter a string:");
gets(str);
printf("Enter a substring:");
gets(substr);
while( str[i] != '\0' )
{
count1++;
i++;
}
while( substr[i] != '\0' )
{
count2++;
i++;
}
printf("\nEnter the position to insert the substring");
scanf("%d",&pos);
strcpy(newstr,str);
l = pos+count2;
for( i=pos;i<=count1+count2;i++)
{
X = newstr[i];
if(t < count2)
{
str[i] = substr[t];
t = t+1;
}
str[l] = X;
l++;
}
printf("\nNewstring is: %s",str);
}
Program:
Enter a string: hydai
Enter a substring: un
Enter the position to insert the substring: 3
Newstring is hyundai
Aim:
To insert a substring into a string.
Program:
#include<stdio.h>
#include<conio.h>
#include<string.h>
void main()
{
char str[80],newstr[80];
int pos,len,count1=0,
int i=0,t=0 ;
clrscr ();
printf("Enter a string:");
gets(str);
while( str[i] != '\0' )
{
count1++;
i++;
}
printf("\nEnter the position to delete the characters:");
scanf("%d",&pos);
printf("\nEnter the number characters to delete:");
scanf("%d",&len);
t = pos;
for( i=pos+len;i<=count1-len;i++)
{
str[t] = substr[i];
t = t+1;
}
printf("\nNewstring is: %s",str);
}
Program:
Enter a string: hyabundai
Enter the position to delete the characters: 3
Enter the number of characters to delete : 2
Newstring is: hyundai
Aim: String length using while or for loop.
Program:
Code-1:
#include<stdio.h>
#include<conio.h>
#include<string.h>
void main ()
{
char str[80];
int length=0,i=0;
clrscr ();
printf("Enter a string:");
gets(str);
while( str[i] != '\0' )
{
length++;
i++;
}
printf("\nLength of a string is : %d",length);
}
Code-2:
#include<stdio.h>
#include<conio.h>
#include<string.h>
void main ()
{
char str[80];
int length=0;
clrscr ();
printf("Enter a string:");
gets(str);
for( i=0; str[i] != '\0'; i++ )
{
length++;
}
printf("\nLength of a string is : %d",length);
}
Aim:
To Reverse a string using library functions
Program:
Code-1:
#include< stdio.h>
#include<string.h>
void main ()
{
char str[80];
int i;
printf("Enter a String:");
gets(str);
printf("\nReverse string is:");
for(i=strlen(str)-1;i>0;i--)
printf("%c",str[i]);
}
Output:
Enter a string: hahaha
Revere string is: ahahah
Code-2:
#include< stdio.h>
#include<string.h>
void main ()
{
char str[80];
printf("Enter a String:");
gets(str);
printf("%s\n",str);
printf("Reverse string is:%s",strrev(str));
}
Output:
Enter a string: cprogram
Reverse string is: margorpc
Aim:
To demonstrate the string Handling Functions.
Program:
#include<stdio.h>
#inude<string.h>
void main ()
{
char S1[50],S2[50];
puts("Enter first string:");
gets(S1);
puts("\nEntet second string:");
gets(S2);
printf("\nleangths of S1 is %d and S2 is %d.",strlen (S1),strlen (S2));
if( !strcmp(S1,S2) )
printf("\ntwo strings are equal.");
else
printf("\ntwo strings are not equal.");
strcat(S1,S2);
printf("\n%s",S1);
strcpy( S1,"This is a test");
printf("%s\n",S1);
if( strchr("hello",'e');
printf("e is in hello\n");
if( strstr("hi these","hi");
printf("found hi");
}
Output:
Enter first string: hello
Enter second string: hello
leangths of S1 is 5 and S2 is 5.
two strings are equal
hellohello
This is a test
e is in hello
found hi
Non-Recursive C Program:
Aim: To compare two strings
Program:
#include<stdio.h>
#include<conio.h>
void main()
{
int count1=0,count2=0,flag=0,i; char str1[10],str2[10];
clrscr();
puts("Enter a string:");
gets(str1);
puts("Enter another string:"); gets(str2);
while (str1[count1]!='\0')
count1++;
while (str2[count2]!='\0')
count2++; i=0;
while ( (i < count1) && (i < count2))
{
if (str1[i] == str2[i])
{
i++;
continue;
}
if (str1[i]<str2[i])
{
flag = -1;
break;
}
if (str1[i] > str2[i])
{
flag = 1;
break;
}
}
if (flag==0)
printf("Both strings are equal\n");
if (flag==1)
printf("String1 is greater than string2\n", str1, str2);
if (flag == -1)
printf("String1 is less than string2 \n", str1, str2);
getch();
}
