To Be Familiarize With the Strings

1. WAP to display the length of a string using a user-defined function
2. WAP to concatenate two strings using a user-defined function
3. WAP to display a string in reverse order using the concept of pointer
4. WAP to count total number of vowels in a string entered by a user
5. WAP to enter names of 4 students and display whether any name entered is available or not in the list
6. WAP to display the names of 5 students in ascending order using the concept of pointer

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1.) Length of String

#include <stdio.h>

#include <conio.h>

#include <string.h>

int i,l=0;

int ustrlen (char []);

void main ()

{

char name[20];

clrscr ();

printf ("Enter the name:\n");

gets (name);

l=ustrlen (name);

printf ("The length is %d.",l);

getch ();

}

int ustrlen (char x[])

{

for (i=0;x[i]!='\0';i++)

l++;

return l;

}

==================================================================

2.) Concatenate two Strings

#include <stdio.h>

#include <conio.h>

#include <string.h>

void ustrcat (char [], char []);

void  main ()

{

 char a[20],b[20];

 clrscr ();

 printf ("Enter 1st string to concatenate:\n");

 gets (a);

 printf ("Enter 2nd string to concatenate:\n");

 gets (b);

 printf ("After concatenation.\n");

 ustrcat (a,b);

 getch ();

}

void ustrcat (char a[], char b[])

{

int i,j;

i=strlen(a);

for (j=0;b[j]!='\0';i++,j++)

  {

    a[i]=b[j];

  }

  a[i]='\0';

  puts (a);

}

==================================================================

3.) Reverse Of String

#include <stdio.h>

#include <conio.h>

#include <string.h>

void main ()

{

char word [20],b[20];

int i,l,j=0;

clrscr ();

printf ("Enter the word:\n");

gets (word);

printf ("After reverse:\n");

l=strlen (word);

for (i=l-1;i>=0;i--)

  {

  //b[k]=a[i];

  *(b+j)=*(word+i);

  j++;

  }

  *(b+j)='\0';

  puts (b);

getch ();

}

==================================================================

4.) Count Total Number Of Vowels in a String

#include <stdio.h>

#include <conio.h>

#include <string.h>

void main ()

{

char sen [20];

int i,c=0;

clrscr ();

printf ("Enter the sentence:\n");

gets (sen);

for (i=0;sen[i]!='\0';i++)

  {

   if (sen [i]=='a'||sen [i]=='e'||sen [i]=='i'||sen [i]=='o'||sen [i]=='u')

   c++;

  }

printf ("The total vowel are %d:\n",c);

getch ();

}

==================================================================

5.) Search name of student 

#include <stdio.h>

#include <conio.h>

#include <string.h>

void main ()

{

 char name[4][10],search [10];

 int i;

 clrscr ();

 printf ("Enter the name of 4 students:\n");

 for (i=0;i<4;i++)

 gets (name[i]);

 printf ("Enter the name to search:\n");

 gets (search);

 for (i=0;i<4;i++)

   {

    if (strcmp(search,name[i])==0)

      {

      printf ("Found\n");

      break;

      }

   }

   if (i==4)

   printf ("Not Found\n");

 getch ();

}

=======================================================================================

6.) Arrange names of student in ascending order

#include <stdio.h>

#include <conio.h>

#include <string.h>

void main ()

{

char name [5][10],temp [10];

int i,j;

clrscr ();

printf ("Enter 5 names:\n");

for (i=0;i<5;i++)

gets (name[i]);

for (i=0;i<4;i++)

  {

  for (j=i+1;j<5;j++)

    {

     if (strcmp(name[i],name[j])>0)

       {

       strcpy(temp,name[j]);

       strcpy(name[j],name[i]);

       strcpy(name[i],temp);

       }

    }

  }

  printf ("In ascending:\n");

 for (i=0;i<5;i++)

 {

 puts(name[i]);

 //printf ("\n");

 }

 getch ();

}