Question

(main.c File)
Counting the character occurrences in a file
For this task you are asked to write a program that will open a file called “story.txt”
and count the number of occurrences of each letter from the alphabet in this file.
At the end your program will output the following report:
Number of occurrences for the alphabets:
a was used – times.
b was used – times.
c was used – times…. …and so, on
Assume the file contains only lower-case letters and for simplicity just a single
paragraph. Your program should keep a counter associated with each letter of the
alphabet (26 counters) [Hint: Use array]
Your program should also print a histogram of characters count by adding
a new function print Histogram (int counters []). This function receives the
counters from the previous task and instead of printing the number of times each
character was used, prints a histogram of the counters. An example histogram for
three letters is shown below) [Hint: Use the extended asci character 254]

Answer 1

Answer:

C code

Explanation:

#include <stdio.h>

void histrogram(int counters[])

{

   int i,j;

   int count;

   for(i=0;i<26;i++)

   {

       count=counters[i];

       printf("%c ",i+97);

       for(j=0;j<count;j++)

       {

           printf("="); //= is used

       }

       printf("\n");

      

   }

      

}

int main()

{

   FILE* fp;

   int i;

   int arr[26];

   char c;

   int val;

   // Open the file

fp = fopen("story.txt", "r");

  

if (fp == NULL) {

printf("Could not open file ");

return 0;

}

else

{

   for(i=0;i<26;i++)

   arr[i]=0;

  

   for (c = getc(fp); c != EOF; c = getc(fp))

   {

       if(c>='a' && c<='z')

       {

           val = c-97;

           //printf("%d ",val);

           arr[val]++;

          

           }

       }

       histrogram(arr);

      

  

      

  

   }

}