C Program to Find Longer Repeating Sequence

This C Program find Longer Repeating Sequence.

Here is source code of the C Program to find Longer Repeating Sequence. The C program is successfully compiled and run on a Linux system. The program output is also shown below.

```
/*
```

 * C Program to find Longer Repeating Sequence

```
 */
```
```
#include <stdio.h>
```
```
#include <string.h>
```
```
 
```
```
void main()
```
```
{
```

    char s1[100], ar[10][20], ar1[10][20], new[10];

    int i, j = 0, k = 0, l, count = 0, flag = 0, n, temp, len[20], maxlen = 0;

```
 
```
```
    printf("\nEnter the string:");
```
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    scanf(" %[^\n]s", s1);
```
```
 
```

    /*COPYING GIVEN STRING TO 2D ARRAY*/

```
    for (i = 0;s1[i] != '\0';i++,j++)
```
```
    {
```
```
        if (s1[i] >= 33 && s1[i] <= 64)
```
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            i++;
```
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        if (s1[i] == ' ')
```
```
        {
```
```
            ar[k][j] = '\0';
```
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            k++;
```
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            i++;
```
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            j = 0;
```
```
        }
```
```
        ar[k][j] = s1[i];
```
```
    }
```
```
    ar[k][j] = '\0';
```

    /*PLACING THE REPEATED WORDS AND LENGTHS INTO NEW ARRAY*/

```
    l = 0;
```
```
    for (i = 0;i <= k;i++)
```
```
    {
```
```
        for (j = i + 1;j <= k;j++)
```
```
        {
```

            if (strcmp(ar[i], ar[j]) == 0)

```
            {
```

                for (n = 0;n < l && l != 0; n++)

```
                {
```

                    if (strcmp(ar[i], ar1[k]) == 0)

```
                    {
```
```
                        flag = 1;
```
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                        break;
```
```
                    }
```
```
                }
```
```
                if (flag != 1)
```
```
                {
```

                    strcpy(ar1[l], ar[i]);

                    len[l] = strlen(ar1[l]);

```
                    l++;
```
```
                }
```
```
                flag = 0;
```
```
                break;
```
```
            }
```
```
        }
```
```
    }
```
```
    printf("\n");
```

    /*SORTING IS DONE BASED ON THEIR LENGTHS*/

```
    for (i = 0;i < l;i++)
```
```
    {
```
```
        for (j = i + 1;j < l;j++)
```
```
        {
```
```
            if (len[i] < len[j])
```
```
            {
```
```
                temp = len[i];
```
```
                strcpy(new, ar1[i]);
```
```
                len[i] = len[j];
```
```
                strcpy(ar1[i], ar1[j]);
```
```
                len[j] = temp;
```
```
                strcpy(ar1[j], new);
```
```
            }
```
```
        }
```
```
    }
```
```
    maxlen = len[0];
```
```
    for (i = 0;i < l;i++)
```
```
    {
```
```
      if (len[i] == maxlen)
```

      printf("\nThe longer repeating sequence of the given string is: %s", ar1[i]);

```
    }
```
```
}
```

$ cc string22.c
$ a.out
Enter the string:Welcome to C Programming Class, Welcome Again to C Programming Class!
 
The longer repeating sequence of the given string is: Programming
 
Enter the string:Welcome to Sanfoundry, Welcome to C Class
 
 
The longer repeating sequence of the given string is: Welcome

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