ch1-Arrays

Chapter_1     ch1-Chars                                                                      ch1-Functions 

Contents:

countc.c     Exercise_1-13     Exercise_1-14 

countc.c     K&R, p. 22     (Count digits, whitespace, other characters)     download

#include <stdio.h> // for getchar(), putchar(), printf(), EOF

// counts digits, whitespaces, other characters

int main()

{

  int c, i;

  int nwhite = 0, nother = 0;

  int ndigit[10];

  for (i = 0; i < 10; i++)

  {ndigit[i] = 0;}

  while ((c = getchar()) != EOF)

  {

    if (c >= '0' && c <= '9')

      {++ndigit[c-'0'];}

    else if (c == ' ' || c == '\t' || c == '\n')

      {++nwhite;}

    else {++nother;}

  }

  printf("digits = \t");

  for (i = 0; i < 10; i++)

    {printf("%3d", i);}

  putchar('\n');

  putchar('\t');putchar('\t');

  for (i = 0; i < 10; i++)

    {printf("---");}

  putchar('\n');

  printf("occurrences = \t");

  for (i = 0; i < 10; i++)

    {printf("%3d", ndigit[i]);}

  putchar('\n');

  printf("whitespaces = \t%d\n", nwhite);

  printf("others = \t%d\n", nother);

}

/*

gcc countc.c -o countc

./countc // input from keyboard

Hello!

0 1 2 3 4 5 6 7 8 9

digits =          0  1  2  3  4  5  6  7  8  9

                ------------------------------

occurrences =     1  1  1  1  1  1  1  1  1  1

whitespaces =   11 // 9 blanks, 2 newlines

others =        6

// Ctrl^D in Linux, Ctrl^Z+Enter in Windows (EOF)

./countc < countc.c // input from source file

digits =          0  1  2  3  4  5  6  7  8  9

                ------------------------------

occurrences =    18 31  5  8  7  6 13 11  8  9

whitespaces =   514

others =        964

./countc < countc // input from binary file

digits =          0  1  2  3  4  5  6  7  8  9

                ------------------------------

occurrences =    16  7 16  5  8  8  7  1 17  6

whitespaces =   81

others =        16668

*/

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Exercise 1-13     K&R, p. 24     (Histogram of word lengths)

Exercise 1-13. Write a program to print a histogram of the lengths of words in its input. It is easy to draw the histogram with the bars horizontal; a vertical orientation is more challenging.

Contents:     histwh.c     histwv.c 

histwh.c     (horizontal)     download

#include <stdio.h> // for getchar(), putchar(), printf(), EOF

#define MAXLENGTHS 1000 // max no of different word lengths

#define FALSE 0

#define TRUE  1

// histogram of lengths of words, horizontally

int main()

{

  int c, i, j;

  int wlengths[MAXLENGTHS]; // keep unsorted

  int occurrences[MAXLENGTHS]; // match wlengths[]

  int wl = 0; // current word length

  int nwl = 0; // no of different word lengths

  int newlength = FALSE; // new word length

  for (i = 0; i < MAXLENGTHS; i++) // initialize

  {occurrences[i] = wlengths[i] = 0;}

  while ((c = getchar()) != EOF)

  {

    if (c == ' ' || c == '\t' || c == '\n' || c == '\f' || c == '\r' || c == '\v')

    {

      if (wl > 0) // new word

      {

        newlength = TRUE;

        for (i = 0; i < nwl; i++)

        {

          if (wl == wlengths[i])

          {

            occurrences[i]++;

            newlength = FALSE;

            break; // out of for()

          }

        }

        if (newlength == TRUE)

        {

          newlength = FALSE; // reset newlength

          wlengths[nwl] = wl; // word length

          occurrences[nwl]++; // occurrences[nwl] = 1;

          nwl++; // array index starts at 0, initial value of nwl

        }

        wl = 0; // reset current word length

      }

      // else skip whitespace

    }

    else {wl++;} // not whitespace

  }

  printf("\t\tLEGEND:\n");

  printf("Lengths:\t");

  for (i = 0; i < nwl; i++) // print until wlengths[i] == 0

  {printf("%d ",wlengths[i]);}

  putchar('\n');

  printf("Occurrences:\t");

  for (i = 0; i < nwl; i++)

  {printf("%d ",occurrences[i]);}

  putchar('\n');

  printf("\t\tHISTOGRAM:\n");

  printf("Lengths:\tOccurrences:\n");

  for (i = 0; i < nwl; i++)

  {

    printf("%8d\t",wlengths[i]); // 8 is the length of "Lengths:"

    for (j = 0; j < occurrences[i]; j++)

      {putchar('-');}

    putchar('\n');

  }

}

/*

gcc histwh.c -o histwh

./histwh < histwh.c // input source file

                                  LEGEND:

Lengths:        8 9 7 10 4 2 3 5 1 6 12 21 24 11 15 17 13 19 16 14 25 27 35 28 

Occurrences:    6 9 10 8 30 78 27 16 60 17 2 2 2 5 3 1 1 2 2 3 1 1 1 1 

                                  HISTOGRAM:

Lengths:               Occurrences:

       8               ------

       9               ---------

       7               ----------

      10               --------

...................

./histwh < histwh // input binary file

                                 LEGEND:

Lengths:        56 240 7 174 103 24 282 19 67 123 23 270 15 168 2594 84 49 107 63 145 8 1 6 257 11 36 34 12 45 40 65 41 2815 16 3 13 88 54 86 4 32 31 3130 127 315 233 120 206 344 44 69 215 52 22 75 1091 99 459 263 48 55 358 191 

Occurrences:    1 1 11 1 1 1 1 3 1 1 10 1 3 1 1 1 1 1 2 1 5 3 1 1 2 1 2 2 1 1 1 1 1 2 1 1 1 1 1 1 1 1 1 3 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 1 1 

                                  HISTOGRAM:

Lengths:              Occurrences:

     56               -

    240               -

      7               -----------

    174               -

    103               -

     24               -

    282               -

     19               --- 

    168               -

   2594               -

     84               -

................

*/

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histwv.c     (vertical)     download

#include <stdio.h> // for getchar(), putchar(), printf(), EOF

#define MAXLENGTHS 1000 // max no of different word lengths

#define FALSE 0

#define TRUE  1

// histogram of lengths of words, vertically

int main()

{

  int c, i, j;

  int wlengths[MAXLENGTHS]; // keep unsorted

  int occurrences[MAXLENGTHS]; // match wlengths[]

  int maxocc = 0; // max no of occurrences of a length

  int wl = 0; // current word length

  int nwl = 0; // no of different word lengths

  int newlength = FALSE; // new word length

  for (i = 0; i < MAXLENGTHS; i++) // initialize

  {occurrences[i] = wlengths[i] = 0;}

  while ((c = getchar()) != EOF)

  {

    if (c == ' ' || c == '\t' || c == '\n' || c == '\f' || c == '\r' || c == '\v')

    {

      if (wl > 0) // new word

      {

        newlength = TRUE;

        for (i = 0; i < nwl; i++)

        {

          if (wl == wlengths[i])

          {

            occurrences[i]++;

            if (occurrences[i] > maxocc)

            {maxocc = occurrences[i];}

            newlength = FALSE;

            break; // out of for()

          }

        }

        if (newlength == TRUE)

        {

          newlength = FALSE; // reset newlength

          wlengths[nwl] = wl; // word length

          occurrences[nwl]++; // occurrences[nwl] = 1;

          if (occurrences[nwl] > maxocc) // if (maxocc == 0)

          {maxocc = occurrences[nwl];}  // {maxocc = 0;}

          nwl++; // array index starts at 0, initial value of nwl

        }

        wl = 0; // reset current word length

      }

      // else skip whitespace

    }

    else {wl++;} // not whitespace

  }

  printf("\t\tLEGEND:\n");

  printf("Lengths:\t");

  for (i = 0; i < nwl; i++) // print until wlengths[i] == 0

  {printf("%d ",wlengths[i]);}

  putchar('\n');

  printf("Occurrences:\t");

  for (i = 0; i < nwl; i++)

  {printf("%d ",occurrences[i]);}

  putchar('\n');

  printf("\t\tHISTOGRAM:\n");

  printf("Occ.:\t\\\tLengths:\n");

  for (i = 0; i < nwl; i++)

  {printf("%d ",wlengths[i]);}

  putchar('\n');

  for (i = 0; i < maxocc; i++)

  { 

    for (j = 0; j < nwl; j++)

    {

      if(occurrences[j] > i)

        {putchar('|');putchar(' ');}

      else {putchar(' ');putchar(' ');} // indent

    }

    putchar('\n');

  }

}

/*

gcc histwv.c -o histwv

./histwv < histwv.c // input source file

                LEGEND:

Lengths:        8 9 7 10 4 2 3 5 1 6 21 24 11 15 12 17 16 13 19 18 14 25 27 32 23 

Occurrences:    6 9 17 9 35 91 30 16 72 19 2 2 7 2 2 3 4 1 2 1 4 1 1 1 1 

                HISTOGRAM:

Occ.:   \       Lengths:

8 9 7 10 4 2 3 5 1 6 21 24 11 15 12 17 16 13 19 18 14 25 27 32 23 

| | | | | | | | | | | | | | | | | | | | | | | | | 

| | | | | | | | | | | | | | | | |   |   |         

| | | | | | | | | |     |     | |       |         

| | | | | | | | | |     |       |       |         

..............................................                

./histwv < histwv // input binary file

                LEGEND:

Lengths:        56 240 7 174 103 24 228 53 19 67 123 23 270 15 168 2594 84 49 107 63 155 8 1 6 349 11 45 34 12 40 66 9 4 25 2620 16 3 13 98 54 75 10 32 31 3138 127 315 233 120 206 344 44 69 215 52 86 39 35 1091 99 459 263 48 55 358 191 

Occurrences:    1 1 11 1 1 1 1 1 2 1 1 10 1 3 1 1 1 1 1 1 1 4 4 1 1 3 3 3 2 1 1 1 2 1 1 2 1 1 1 1 1 1 1 1 1 3 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 1 1 

                HISTOGRAM:

Occ.:   \       Lengths:

56 240 7 174 103 24 228 53 19 67 123 23 270 15 168 2594 84 49 107 63 155 8 1 6 349 11 45 34 12 40 66 9 4 25 2620 16 3 13 98 54 75 10 32 31 3138 127 315 233 120 206 344 44 69 215 52 86 39 35 1091 99 459 263 48 55 358 191 

| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 

    |           |     |   |               | |     | | 

...................................                                                   

*/

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Exercise 1-14     K&R, p. 24     (Histogram of frequencies)

Exercise 1-14. Write a program to print a histogram of the frequencies of different characters in its input.

Contents:     histch.c     histcv.c 

histch.c     (horizontal)     download

#include <stdio.h> // for getchar(), putchar(), printf(), EOF

// histogram of frequencies of different characters, horizontally

int main()

{

  int c, i, j;

  int digits[10]; // 0..9

  int lower[26]; // a..z

  int upper[26]; // A..Z

  int white[6]; // whitespace: ' ', '\t', '\n', '\f', '\r', '\v'

  for (i = 0; i < 10; i++) // initialize

  {digits[i] = 0;} // initially, 0 occurrences

  for (i = 0; i < 26; i++) // initialize

  {lower[i] = upper[i] = 0;}

  for (i = 0; i < 6; i++) // initialize

  {white[i] = 0;}

  while ((c = getchar()) != EOF)

  {

    if (c == ' ') {white[0]++;}

    else if (c == '\t') {white[1]++;}

    else if (c == '\n') {white[2]++;}

    else if (c == '\f') {white[3]++;}

    else if (c == '\r') {white[4]++;}

    else if (c == '\v') {white[5]++;}

    else if (c >= '0' && c <= '9')

    {digits[c-'0']++;}

    else if (c >= 'A' && c <= 'Z')

    {upper[c-'A']++;}

    else if (c >= 'a' && c <= 'z')

    {lower[c-'a']++;}

  }

  printf("\t\tLEGEND:\n");

  printf("Spaces: %d ", white[0]);

  printf("Tabs: %d ", white[1]);

  printf("Newlines: %d ", white[2]);

  printf("Form feeds: %d ", white[3]);

  printf("Returns: %d ", white[4]);

  printf("Vertical tabs: %d ", white[5]);

  putchar('\n');

  printf("Digits:\t\t");

  for (i = 0; i <= 9; i++)

  {printf("%d ",i);}

  putchar('\n');

  printf("Occurrences:\t");

  for (i = 0; i <= 9; i++)

  {printf("%d ",digits[i]);}

  putchar('\n');

  printf("Lowercase:\t");

  for (i = 'a'; i <= 'z'; i++)

  {putchar(i);putchar(' ');}

  putchar('\n');

  printf("Occurrences:\t");

  for (i = 0; i < 26; i++)

  {printf("%d ",lower[i]);}

  putchar('\n');

  printf("Uppercase:\t");

  for (i = 'A'; i <= 'Z'; i++)

  {putchar(i);putchar(' ');}

  putchar('\n');

  printf("Occurrences:\t");

  for (i = 0; i < 26; i++)

  {printf("%d ",upper[i]);}

  putchar('\n');

   putchar('\n');

  printf("\t\tHISTOGRAM:\n");

  printf("Spaces:\t\t");

  for (i = 0; i < white[0]; i++)

    {putchar('-');}

  putchar('\n');

  printf("Tabs:\t\t");

  for (i = 0; i < white[1]; i++)

    {putchar('-');}

  putchar('\n');

  printf("Newlines:\t");

  for (i = 0; i < white[2]; i++)

    {putchar('-');}

  putchar('\n');

  printf("Form feeds:\t");

  for (i = 0; i < white[3]; i++)

    {putchar('-');}

  putchar('\n');

  printf("Returns:\t");

  for (i = 0; i < white[4]; i++)

    {putchar('-');}

  putchar('\n');

  printf("Vertical tabs:\t");

  for (i = 0; i < white[5]; i++)

    {putchar('-');}

  putchar('\n');

  printf("Digits:\n");

  for (i = 0; i <= 9; i++)

  {

    printf("%d\t",i);

    for (j = 0; j < digits[i]; j++)

      {putchar('-');}

    putchar('\n');

  }

  printf("Lowercase letters:\n");

  for (i = 0; i < 26; i++)

  {

    putchar('a'+i);printf("\t");

    for (j = 0; j < lower[i]; j++)

      {putchar('-');}

    putchar('\n');

  }

  printf("Uppercase letters:\n");

  for (i = 0; i < 26; i++)

  {

    putchar('A'+i);printf("\t");

    for (j = 0; j < upper[i]; j++)

      {putchar('-');}

    putchar('\n');

  }

}

/*

gcc histch.c -o histch

./histch < histch.c // input source file

                LEGEND:

Spaces: 604 Tabs: 0 Newlines: 134 Form feeds: 0 Returns: 0 Vertical tabs: 0 

Digits:         0 1 2 3 4 5 6 7 8 9 

Occurrences:    31 5 10 3 3 3 9 0 0 5 

Lowercase:      a b c d e f g h i j k l m n o p q r s t u v w x y z 

Occurrences:    61 5 86 21 97 71 10 71 189 10 0 30 4 80 39 81 1 124 49 148 48 2 31 0 3 7 

Uppercase:      A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 

Occurrences:    6 0 0 3 3 3 2 1 1 0 0 3 1 3 5 0 0 3 3 3 2 2 0 0 0 3  

                HISTOGRAM:

Spaces:         ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Tabs:           

Newlines:       --------------------------------------------------------------------------------------------------------------------------------------

Form feeds:

Returns:

Vertical tabs:

Digits:

0       -------------------------------

1       -----

2       ----------

3       ---

4       ---

5       ---

6       ---------

7

8

9       -----

Lowercase letters:

a       -------------------------------------------------------------

b       -----

................

z       -------

Uppercase letters:

A       ------

B

................

Z       ---

./histch < histch // input binary file

                LEGEND:

Spaces: 57 Tabs: 37 Newlines: 30 Form feeds: 12 Returns: 9 Vertical tabs: 18 

Digits:         0 1 2 3 4 5 6 7 8 9 

Occurrences:    17 8 19 2 8 9 8 2 17 16 

Lowercase:      a b c d e f g h i j k l m n o p q r s t u v w x y z 

Occurrences:    79 26 41 45 85 23 20 27 63 0 4 39 26 54 40 20 2 72 63 96 37 2 6 15 18 6 

Uppercase:      A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 

Occurrences:    22 18 18 27 14 11 20 89 22 2 0 22 15 11 6 6 1 11 9 23 11 4 2 12 2 2 

                HISTOGRAM:

Spaces:         ---------------------------------------------------------

Tabs:           -------------------------------------

Newlines:       ------------------------------

Form feeds:     ------------

Returns:        ---------

Vertical tabs:  ------------------

Digits:

0       -----------------

1       --------

2       -------------------

3       --

4       --------

5       ---------

6       --------

7       --

8       -----------------

9       ----------------

Lowercase letters:

a       -----------...

b       --------------------------

.....................

z       ------

Uppercase letters:

A       ----------------------

B       ------------------

.....................

Z       --

*/

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histcv.c     (vertical)     download

#include <stdio.h> // for getchar(), putchar(), printf(), EOF

// histogram of frequencies of different characters, vertically

int main()

{

  int c, i, j;

  int max; // max no of occs of diff char types

  int digits[10]; // 0..9

  int lower[26]; // a..z

  int upper[26]; // A..Z

  int white[6]; // whitespace: ' ', '\t', '\n', '\f', '\r', '\v'

  for (i = 0; i < 10; i++) // initialize

  {digits[i] = 0;} // initially, 0 occurrences

  for (i = 0; i < 26; i++) // initialize

  {lower[i] = upper[i] = 0;}

  for (i = 0; i < 6; i++) // initialize

  {white[i] = 0;}

  while ((c = getchar()) != EOF)

  {

    if (c == ' ') {white[0]++;}

    else if (c == '\t') {white[1]++;}

    else if (c == '\n') {white[2]++;}

    else if (c == '\f') {white[3]++;}

    else if (c == '\r') {white[4]++;}

    else if (c == '\v') {white[5]++;}

    else if (c >= '0' && c <= '9')

    {digits[c-'0']++;}

    else if (c >= 'A' && c <= 'Z')

    {upper[c-'A']++;}

    else if (c >= 'a' && c <= 'z')

    {lower[c-'a']++;}

  }

  printf("\t\tLEGEND:\n");

  printf("Spaces: %d ", white[0]);

  printf("Tabs: %d ", white[1]);

  printf("Newlines: %d ", white[2]);

  printf("Form feeds: %d ", white[3]);

  printf("Returns: %d ", white[4]);

  printf("Vertical tabs: %d ", white[5]);

  putchar('\n');

  printf("Digits:\t\t");

  for (i = 0; i <= 9; i++)

  {printf("%d ",i);}

  putchar('\n');

  printf("Occurrences:\t");

  for (i = 0; i <= 9; i++)

  {printf("%d ",digits[i]);}

  putchar('\n');

  printf("Lowercase:\t");

  for (i = 'a'; i <= 'z'; i++)

  {putchar(i);putchar(' ');}

  putchar('\n');

  printf("Occurrences:\t");

  for (i = 0; i < 26; i++)

  {printf("%d ",lower[i]);}

  putchar('\n');

  printf("Uppercase:\t");

  for (i = 'A'; i <= 'Z'; i++)

  {putchar(i);putchar(' ');}

  putchar('\n');

  printf("Occurrences:\t");

  for (i = 0; i < 26; i++)

  {printf("%d ",upper[i]);}

  putchar('\n');

  putchar('\n');

  printf("\t\tHISTOGRAM:\n");

/*

  printf("Spaces:\tTabs:\tNewlines:\tForm feeds:\tReturns:\tVertical tabs:\n");

  max = 0;

  for (i = 0; i < 6; i++)

  {

    if(max < white[i]) {max = white[i];}

  }

  for (i = 0; i < max; i++)

  {

    for (j = 0; j < 6; j++)

    {

      if (white[j] > i) {putchar('|');putchar('\t');}

      else {putchar('\t');} // indent

    }

    putchar('\n');

  }

*/

  printf("Digits:\n");

  for (i = 0; i <= 9; i++) {printf("%d ", i);}

  putchar('\n');

  max = 0; // reset max

  for (i = 0; i <= 9; i++)

  {

    if(max < digits[i]) {max = digits[i];}

  }

  for (i = 0; i < max; i++)

  {

    for (j = 0; j <= 9; j++)

    {

      if (digits[j] > i) {putchar('|');putchar(' ');}

      else {putchar(' ');putchar(' ');} // indent

    }

    putchar('\n');

  }

  printf("Lowercase letters:\n");

  for (i = 0; i < 26; i++)

  {putchar('a'+i);putchar(' ');}

  putchar('\n');

  max = 0; // reset max

  for (i = 0; i < 26; i++)

  {

    if(max < lower[i]) {max = lower[i];}

  }

  for (i = 0; i < max; i++)

  {

    for (j = 0; j < 26; j++)

    {

      if (lower[j] > i) {putchar('|');putchar(' ');}

      else {putchar(' ');putchar(' ');} // indent

    }

    putchar('\n');

  }

  printf("Uppercase letters:\n");

  for (i = 0; i < 26; i++)

  {putchar('A'+i);putchar(' ');}

  putchar('\n');

  max = 0; // reset max

  for (i = 0; i < 26; i++)

  {

    if(max < upper[i]) {max = upper[i];}

  }

  for (i = 0; i < max; i++)

  {

    for (j = 0; j < 26; j++)

    {

      if (upper[j] > i) {putchar('|');putchar(' ');}

      else {putchar(' ');putchar(' ');} // indent

    }

    putchar('\n');

  }

}

/*

gcc histcv.c -o histcv

./histcv < histcv.c // input source file

                LEGEND:

Spaces: 784 Tabs: 0 Newlines: 155 Form feeds: 0 Returns: 0 Vertical tabs: 0 

Digits:         0 1 2 3 4 5 6 7 8 9 

Occurrences:    37 4 13 2 2 2 15 0 0 7 

Lowercase:      a b c d e f g h i j k l m n o p q r s t u v w x y z 

Occurrences:    89 5 96 28 118 79 12 68 212 17 0 36 25 81 46 85 1 134 60 151 56 9 30 21 4 6 

Uppercase:      A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 

Occurrences:    6 0 0 3 3 3 2 1 1 0 0 3 1 3 5 0 0 3 3 3 2 2 0 0 0 3 

                HISTOGRAM:

Digits:

0 1 2 3 4 5 6 7 8 9 

| | | | | | |     | 

| | | | | | |     | 

| | |       |     | 

...................

Lowercase letters:

a b c d e f g h i j k l m n o p q r s t u v w x y z 

| | | | | | | | | |   | | | | | | | | | | | | | | | 

| | | | | | | | | |   | | | | |   | | | | | | | | | 

| | | | | | | | | |   | | | | |   | | | | | | | | | 

| | | | | | | | | |   | | | | |   | | | | | | | | | 

| | | | | | | | | |   | | | | |   | | | | | | |   | 

|   | | | | | | | |   | | | | |   | | | | | | |   | 

|   | | | | | | | |   | | | | |   | | | | | | |     

...................................

Uppercase letters:

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 

|     | | | | | |     | | | |     | | | | |       | 

|     | | | |         |   | |     | | | | |       | 

|     | | |           |   | |     | | |           | 

|                           |                       

|                           |                       

|                                                   

./histcv < histcv // input binary file

                LEGEND:

Spaces: 77 Tabs: 28 Newlines: 27 Form feeds: 13 Returns: 9 Vertical tabs: 18 

Digits:         0 1 2 3 4 5 6 7 8 9 

Occurrences:    18 8 19 4 9 9 8 2 16 12 

Lowercase:      a b c d e f g h i j k l m n o p q r s t u v w x y z 

Occurrences:    75 23 39 42 77 22 20 25 61 0 6 37 24 54 39 19 2 69 57 93 36 3 5 13 18 6 

Uppercase:      A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 

Occurrences:    22 18 18 29 15 10 19 91 22 2 0 23 14 9 7 5 1 8 7 22 11 2 2 9 2 2 

                HISTOGRAM:

Digits:

0 1 2 3 4 5 6 7 8 9 

| | | | | | | | | | 

| | | | | | | | | | 

| | | | | | |   | | 

| | | | | | |   | | 

| | |   | | |   | | 

| | |   | | |   | | 

| | |   | | |   | | 

| | |   | | |   | | 

|   |   | |     | | 

|   |           | | 

....................

Lowercase letters:

a b c d e f g h i j k l m n o p q r s t u v w x y z 

| | | | | | | | |   | | | | | | | | | | | | | | | | 

| | | | | | | | |   | | | | | | | | | | | | | | | | 

| | | | | | | | |   | | | | | |   | | | | | | | | | 

| | | | | | | | |   | | | | | |   | | | |   | | | | 

| | | | | | | | |   | | | | | |   | | | |   | | | | 

| | | | | | | | |   | | | | | |   | | | |     | | | 

| | | | | | | | |     | | | | |   | | | |     | |   

.......................... 

Uppercase letters:

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 

| | | | | | | | | |   | | | | | | | | | | | | | | | 

| | | | | | | | | |   | | | | |   | | | | | | | | | 

| | | | | | | | |     | | | | |   | | | |     |     

................................

*/

Note: The histogram for whitespaces is commented out, as spaces displayed vertically fill the terminal window.  If you let it in, you can run the program with:

./histcv < histcv.c | less

then hit Enter or the space bar, or save the result to a file:

./histcv < histcv.c > output.txt

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