please write in only the C language!!!! no C++ parsing practice input file is in

Question

please write in only the C language!!!! no C++

parsing practice

input file is input8.txt

Function Prototypes:

bool isATime(char* word)

bool isADate(char* word)

bool is APhoneNumber(char* word)

each has the same definition where the input is a string and it returns a true or false

RULES FOR FUNCTION

DATES:

x/xx/xxxx x/x/xxxx xx/x/xxxx xx/xx/xxxx

numbers only

valid date (example 2/30 is invalid)

TIME

xx:xxam x:xxam xx:xx pm x:xxpm

only numbers in place of x's

valid hours only (1-12) and min (0-59)

PHONE NUMBERS

xxx-xxx-xxxx

only numbers

SAMPLE OUTPUT

you will be given a file filled with tokens.

input8.txt file contains

OUTPUT:

TIME FOUND:5:54pm

TIME FOUND:10:30am

DATE FOUND:11/4/2000

PHONE NUMBER FOUND: 123-456-7890

Explanation / Answer

#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <string.h>
#include <ctype.h>

void parseFile(char* filename);
void parseWord(char* word);
bool isAPhoneNumber(char* word);
bool isADate(char* word);
bool isATime(char* word);

int main(int argc, char** argv)
{
   parseFile(argv[1]);  
   return 0;
}

void parseFile(char* filename)
{
   FILE* fp = fopen(filename, "r");
   char* word = malloc(sizeof(char)*255);
   char c;
   int i = 0;
   bool periodInWord = false;
   bool wasWordDone = false;

   while((c = fgetc(fp)) != EOF)
   {
       //thought this would cause a corner case, will keep here anyway.
       if(c == ' ')
       {
           wasWordDone = true;
       }
       //these separate words from each other.
       else if(c == ' ' || c == ',' || c == '.')
       {
           wasWordDone = true;
       }
       //this is either a letter or character that is part of a word.
       else
       {
           //still on the same word.
           if(wasWordDone == false)
           {
               word[i] = c;
               i++;
           }
           //new word has been started. Process old word, then
           //start over.
           else
           {
               word[i] = '';
               i = 0;
               parseWord(word);
               free(word);
               word = malloc(sizeof(char)*255);
               word[i] = c;
               wasWordDone = false;
               i++;
           }
       }  
   }
  
   parseWord(word);  
   fclose(fp);
   free(word);
}

void parseWord(char* word)
{
    if (word[strlen(word) - 1] == ' ')
    {
        word[strlen(word) - 1] = '';
    }
        if(isAPhoneNumber(word))
   {
       printf("Phone Number found: %s ", word);
   }
   if(isADate(word))
   {
       printf("Date found: %s ", word);
   }
   if(isATime(word))
   {
       printf("Time found: %s ", word);
   }
}

bool isAPhoneNumber(char* word)
{
    int i = 0;
  
    for(i = 0; word[i] != ''; i++)
    {

        if(i == 3 || i == 7)//If there's supposed to be a dash
        {
            if(word[i] != '-')
            {
                return false;
            }
        }
      
        else if(!isdigit(word[i]))//if its not a digit
        {
            return false;
        }
    }
    if(i != 12)//If the length is wrong
    {
            return false;
    }
    return true;//You survived!
}

bool isADate(char* word)
{

    int daysPerMonth[12] = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};

    int earliestValidYear = 1970;
    int earliestValidDay = 1;
    int earliestValidMonth = 1;
    int day, month, year;
  
    int i = 0, j=0;
  
    for(j=0; j<2; j++)
    {
        if(!isdigit(word[i]))//Invalid character for first char
        {
            return false;
        }
  
        i++;
  
        if(word[i] != '/' && !isdigit(word[i]))
        {
            return false;
        }
  
        if(isdigit(word[i]))
        {  
            i++;
            if(word[i] != '/')
            {
            return false;
            }
        }
        i++;
    }//End for
    for(j = 0; j<4; j++)//Check for four digits
    {
        if(!isdigit(word[i]))
        {
            return false;
        }
        i++;
    }
    if (word[i] != '')
    {
        return false;
    }
  
    sscanf(word, "%d/%d/%d", &month, &day, &year);

    if(month < earliestValidMonth || month >12)//Valid month
    {
        return false;
    }
    else if(day < earliestValidDay || day > daysPerMonth [month-1])//valid day
    {
        return false;
    }
    else if(year < earliestValidYear)
    {
        return false;
    }
    else
    {
        return true;//You survived!
    }

}

bool isATime(char* word)
{

    int i = 0;
  
    if(!isdigit(word[i]))//first char must be digit
    {
        return false;
    }
    i++;
    if(word[i] != ':' && !isdigit(word[i]))//If it's not a colon or digit
        {
            return false;
        }
  
    if(isdigit(word[i]))//splinter group
        {  
            i++;
            if(word[i] != ':')
            {
                return false;
            }
        }
   i++;
   if(!isdigit(word[i]) || !isdigit(word[++i])) //check next two digits
   {
       return false;
   }
      
   i++;

   if(word[i] != 'a' && word[i] != 'p')//check for correct character
   {
       return false;
   }

   i++;

   if(word[i] != 'm')
   {
       return false;
   }

   i++;

   if (word[i] != '')//If the string isnt over
   {
       return false;
   }

   int hour, minute;
   char char1, char2;
   sscanf(word, "%d:%d%c%c", &hour, &minute, &char1, &char2);

   if(hour < 1 || hour >12)//invalid hours
   {
       return false;
   }
   if(minute < 0 || minute > 59)//invalid minutes
   {
       return false;
   }

   return true;
}

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