Occurence of a Substring in String in c lan

Check whether two Strings are Anagrams

#include 

#include  

int find_anagram(char [], char []);

int main()

{

    char array1[100], array2[100];

    int flag;

    clrscr();

    printf("Enter the string\n");

    gets(array1);

    printf("Enter another string\n");

    gets(array2);

    flag = find_anagram(array1, array2);

    if (flag == 1)

        printf(""%s" and "%s" are anagrams.\n", array1, array2);

    else

        printf(""%s" and "%s" are not anagrams.\n", array1, array2);

    return 0;

}

int find_anagram(char array1[], char array2[])

{

    int num1[26] = {0}, num2[26] = {0}, i = 0;

    while (array1[i] != '\0')

    {

        num1[array1[i] - 'a']++;

        i++;

    }

    i = 0;

    while (array2[i] != '\0')

    {

        num2[array2[i] -'a']++;

        i++;

    }

    for (i = 0; i < 26; i++)

    {

        if (num1[i] != num2[i])

            return 0;

    }

    return 1;

 getch();

}

Output

Enter the string

abll

Enter another string

ball

"abll" and "ball" are anagrams.

Enter the string

tall

Enter another string

all

"tall" and "all" are not anagrams.

To Count the Occurence of a Substring in String

#include 

#include 

#include 

char str[100], sub[100];

int count = 0, count1 = 0;

void main()

{

    int i, j, l, l1, l2;

    clrscr();

    printf("\nEnter a string : ");

    scanf("%[^\n]s", str);

    l1 = strlen(str);

    printf("\nEnter a substring : ");

    scanf(" %[^\n]s", sub);

    l2 = strlen(sub);

    for (i = 0; i < l1;)

    {

        j = 0;

        count = 0;

        while ((str[i] == sub[j]))

        {

            count++;

            i++;

            j++;

        }

        if (count == l2)

        {

            count1++;                                   

            count = 0;

        }

        else

            i++;

    }    

    printf("%s occurs %d times in %s", sub, count1, str);

    getch();

}

Output

Enter a string : prrrogram c prrrogramming

Enter a substring : rr

rr occurs 2 times in prrrogram c prrrogramming

Remove given Word from a String

     #include 

     #include 

#include 

void main()

{

int i, j = 0, k = 0, count = 0;

char str[100], key[20];

char str1[10][20];

clrscr();

printf("enter string:");

scanf("%[^\n]s",str);

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

{

if (str[i]==' ')

{

str1[k][j] = '\0';

k++;

j = 0;

}

else

{

str1[k][j] = str[i];

j++;

}

}

str1[k][j] = '\0';

printf("enter key:");

scanf("%s", key);

for (i = 0;i < k + 1; i++)

{

if (strcmp(str1[i], key) == 0)

{

for (j = i; j < k + 1; j++)

strcpy(str1[j], str1[j + 1]);

k--;

}

}

for (i = 0;i < k + 1; i++)

{

printf("%s ", str1[i]);

}

}

getch();

}

Output

enter string:Welcome to Sanfoundry's C Programming Class, Welcome Again to C class

enter key:Welcome

to Sanfoundry's C Programming Class, Again to C class