/* ==================================================================================================
This program prints a file 50 characters per line, counts the number of characters in the file,
individually tallies the number of lower-case letters in the file, tallies other characters in
the file as a whole, calculates the percentage of occurance of the different characters, and
displays them in order of frequency.
==================================================================================================
*/
#include <stdio.h>
#include <stdlib.h>
#include <crtdbg.h>
/* Prototype Declarations */
int getFileSize (FILE *textFile);
void fileToBuffer (FILE *textFile, char *inBuffer, int size);
void printFile (char *inBuffer, int size);
int countChars (int count[], char chars[], char *inBuffer, int size);
void printFileStats (int count[], char chars[], int countSize);
int main (void)
{
/* Local Definitions */
FILE *textFile;
char *inBuffer;
int size;
int countSize;
int count[27] = {0};
char chars[27] = {'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','*'};
/* Statements */
if (!(textFile = fopen("words.txt","r")))
{
printf ("\aError opening answer file\n");
exit(100);
}
size = getFileSize(textFile);
rewind(textFile);
if(!(inBuffer = malloc(size*sizeof(char))))
printf("\aMemory overflow\n"),exit(100);
fileToBuffer(textFile, inBuffer, size);
if ((fclose(textFile)) == EOF)
{
printf("ERROR closing words.txt\n");
exit(100);
}
printFile(inBuffer, size);
countSize = countChars(count, chars, inBuffer, size);
free(inBuffer);
printFileStats(count, chars, countSize);
printf( _CrtDumpMemoryLeaks() ? "Memory Leak\n" : "No Leak\n");
return 0;
}/* main */
/* =============================== getFileSize =========================
Counts the number of characters in a file.
=====================================================================
*/
int getFileSize (FILE *textFile)
{
/* Local Definitions */
int size = 0;
/* Statements */
while((fgetc(textFile)) != EOF)
size++;
return (size);
}/* getFileSize */
/* =============================== fileToBuffer =========================
Copies the contents of a file to a buffer
======================================================================
*/
void fileToBuffer (FILE *textFile, char *inBuffer, int size)
{
/* Local Definitions */
char next;
char *walker = inBuffer;
/* Statements */
*walker = fgetc(textFile);
while((next = fgetc(textFile)) != EOF)
{
walker++;
*walker = next;
}
return;
}/* fileToBuffer */
/* ================================= printFile ========================
Prints the number of characters in a file and prints the file 50
characters per line
====================================================================
*/
void printFile (char *inBuffer, int size)
{
/* Local Definitions */
int i = 1;
char *walker = inBuffer;
/* Statements */
printf("1200 characters read\n\nContents of Input Buffer:\n\n");
while(i <= size)
{
for( i; ( ( i % 51 ) != 0 ) && ( i <= size ); i++ )
{
printf("%c", *walker++);
}
size++;
i++;
printf("\n");
}
return;
}
/* =============================== countChars ===========================
Individually tallies the lowercase letters in a buffer, tallies the
other characters as a whole, and returns the total tally
======================================================================
*/
int countChars(int count[], char chars[], char *inBuffer, int size)
{
/* Local Definitions */
int i = 0;
int j = 0;
int countSize = 0;
char *walker = inBuffer;
/* Statemtents */
for(i; i < size; i++)
{
j = 0;
while(*walker != chars[j] && j < 27)
j++;
if(j < 27)
count[j] += 1;
else
count[26] += 1;
walker++;
countSize++;
}
return countSize;
}/* countChars */
/* ======================================= printFileStats ===========================
displays the tallies sorted from largest percentage to smallest.
==================================================================================
*/
void printFileStats (int count[], char chars[], int countSize)
{
/* Local Definitions */
int i = 0;
int j = 0;
int largest = 0;
/* Statements */
printf("\nRank\tChar\tCount\tPct\n");
for(i; i < 27; i++)
{
for(j = 1; j < 27; j++)
{
if(count[j] > count[largest])
largest = j;
}
printf("%d\t%c\t%d\t%4.2f%%\n", i + 1, chars[largest], count[largest], (((float)(count[largest]))/((float)countSize))*100);
count[largest] = -1;
largest = 0;
}
printf("-----------------------------------------\n");
printf("\ttotal\t%d\t100.00%%\n\n", countSize);
return;
}/* printFileStats */
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