#include<stdio.h>
#include<ctype.h>
#include<string.h>
 
 
char * vowel_rule(char *);
char * two_letter(char *);
char * last_rule(char *);
void rules();
int YesNo();
void instructions();
 
int main()
{
	do
	{
		instructions();
		rules();	//call function to read in sentence & print piglatin
 
	}while(YesNo() != 0);
 
return(0);
}
 
 
 
void rules()
{
	char str[80];
	char english[80];
	int length,a,b,i;
 
	i=0;
	a=b=0;
 
	printf("Please enter a phrase to be translated to piglatin: ");
	fgets(str,79,stdin);	//store sentence in str
 
	length = strlen(str);
 
	printf("\nThis is your translated sentence: ");
 
	while(a<=length)
	{
		english[b]=str[a];	//copy str to english
 
		if(english[b]==' '||english[b]=='\0')	//check for whitespace
		{
			english[b]='\0';
			b=0;
 
			if(english[0]=='A'||english[0]=='E'||english[0]=='I'||english[0]=='O'||english[0]=='U'||english[0]=='a'||english[0]=='e'||english[0]=='i'||english[0]=='o'||english[0]=='u')	//check for word beginning with vowel
			{ 
				printf(" %s",vowel_rule(english));
 
			}
 
			else if(english[0]=='T'&&english[1]=='H'||english[0]=='C'&&english[1]=='H'||english[0]=='S'&&english[1]=='H'||english[0]=='P'&&english[1]=='H'||english[0]=='W'&&english[1]=='H'||english[0]=='Q'&&english[1]=='U')	//checks for first 2 letters
				{
				printf(" %s",two_letter(english));
				}
			else
			{
			printf(" %s",last_rule(english));	
			}
		}
		else
		{
			b++;
		}
 
		a++;
	}
 
}
 
 
 
 
void instructions()
{
	printf("This program will translate an english word or phrase up to 80 characters\n");
	printf(" into piglatin. The program will convert your phrase according to the\n");
	printf(" following rules:\n\n");
	printf("     Rule 1:  If the word begins with a vowel, 'AY' will be appneded to the\n");
	printf("                end.\n");
	printf("     Rule 2:  If the word begins with 'TH','SH','CH','WH','PH',or 'QU', the\n");
	printf("                first two letters are appended to the end of the word\n");
	printf("                followed by 'AY'\n\n");
	printf("     Rule 3:  If none of the rules apply, the first letter is appended to\n");
	printf("                the end of the word, followed by 'AY'.");
	printf("\n\nThe program will also check for case sensitivity. The output will match the \n");
	printf("   input, whether it is entered in lowercase or uppercase.\n\n\n\n");
 
 
 
}
 
 
 
 
char * vowel_rule(char *str)
{
	static char temp[80];
	memset(temp,'\0',80);
 
	strcpy(temp,str);	//copy word starting from second character to temp
	temp[strlen(temp)+1]= '\0';	// Null terminate temp
	strcat(temp,"AY"); // append "AY" to the string.
 
	return temp;
}
 
 
 
 
char * two_letter(char *str)
{
	static char temp[80];
	memset(temp,'\0',80);
	char first,append[]="H";
 
	first=str[0];	//copy first char of str into first
 
	if(str[1]=='H')
	{
		strcpy(temp,str+=2); //copy word starting from third character to temp
		append[0]=first;
		strcat(temp,append);//copy the first char of word to end of temp
		temp[strlen(temp)+1]='\0'; // Null terminate temp
		strcat(temp,"HAY"); // append "HAY" to the string.
	}
 
	if(str[1]=='U')
	{
	strcpy(temp,str+=2); //copy word starting from third character to temp
	append[0]=first;
	strcat(temp,append);//copy the first char of word to end of temp
	temp[strlen(temp)+1]='\0'; // Null terminate temp
	strcat(temp,"UAY"); // append "UAY" to the string.
	}
 
	return temp;
}
 
 
 
 
char * last_rule(char *str)
{
	static char temp[80];
	memset(temp,'\0',80);
 
	strcpy(temp,++str); //copy word starting from second character to temp
	temp[strlen(temp)]=*(--str); //copy the first char of word to end of temp
	temp[strlen(temp)+1]= '\0'; // Null terminate temp
	strcat(temp,"AY"); // append "AY" to the string.
 
	return temp;
}
 
 
 
int YesNo()
{
	char check;
 
	printf("\n\nWould you like to enter another sentence to be translated(Y/N)?:  ");
	scanf(" %c", &check);
 
	if(check=='Y'||check=='y')
	{
		return (1);
	}
	else
		return (0);
 
}//end of function

a++;
str[--a] = ' ';