All the Characters by Lowercase

Find Longer Repeating Sequence

#include

#include

#include

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];

     clrscr();

    printf("\nenter the string:");

    scanf(" %[^\n]s", s1);

    for (i = 0;s1[i] != '\0';i++,j++)

    {

        if (s1[i] >= 33 && s1[i] <= 64)

            i++;

        if (s1[i] == ' ')

        {

            ar[k][j] = '\0';

            k++;

            i++;

            j = 0;

        }

        ar[k][j] = s1[i];

    }

    ar[k][j] = '\0';

        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;

                        break;

                    }

                }

                if (flag != 1)

                {

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

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

                    l++;

                }

                flag = 0;

                break;

            }

        }

    }

    printf("\n");

        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]);

    }

getch();

}

Output

enter the string: Welcome to C Programming Class, Welcome Again to C Programming Class!

the longer repeating sequence of the given string is: Programming

Replace all the Characters by Lowercase

#include 

#include 

#include 

void main(int argc, char* argv[])

{

    FILE *fp1;

    int ch;

    if ((fp1 = fopen(argv[1], "r+")) == NULL)

    {

        printf("\nfile cant be opened");

        exit(0);

    }

    ch = fgetc(fp1);

    while (ch != EOF)

    {

        if (ch >= 65 && ch <= 90)

        {

            fseek(fp1, -1L, 1);

            fputc(ch + 32, fp1);

        }

        ch = fgetc(fp1);

    }

getch();

}

Output

CHANDANA chanikya

rAVELLA

chandana chanikya

ravella

Count the Total Number of Words in the Sentence using Command Line Argument

#include 

#include 

int main(int argc, char *argv[])

{

    int i = 0;

    clrscr();

    if (argc == 1)

    {

        printf("\n No sentence given on command line");

        return;

    }

    else

    {

        printf("\nThe words in the sentence are:");

        for (i = 1;i < argc;i++)

        {

            printf("\n%s", argv[i]);

         }

        printf("\n\nTotal number of words:");

        printf(" %d", argc-1);

    }

 getch();

}

Output

The words in the sentence are:

Welcome

to

C

Class

Total number of words: 4

No sentence given on command line