// Building a letter frequency table

// (c) 1999 Guy W. Lecky-Thompson

// All Rights Reserved

#include <stdlib.h>

#include <string.h>

void AddLetters(char * szWord, unsigned long ulTable[28][28])

{

int nWordLength, nFirstLetter, nLastLetter, nLetter;

// Decapitalise the word

for (nLetter = 0; nLetter < (int)strlen(szWord)-1;nLetter++)

tolower(szWord[nLetter]);

// Add the first, and last to the table

nWordLength = (int)strlen(szWord);

nFirstLetter = (szWord[0] - 'a') + 1;

nLastLetter = (szWord[nWordLength-1] - 'a') + 1;

ulTable[0][nFirstLetter]++; // Space followed by letter

ulTable[nLastLetter][27]++; // Letter followed by space

for (nLetter = 0; nLetter < nWordLength-2; nLetter++)

{

nFirstLetter = (szWord[nLetter] - 'a') + 1;

nLastLetter = (szWord[nLetter+1] - 'a') + 1;

ulTable[nFirstLetter][nLastLetter]++;

}

}