CS256 - Principles of Structured Design Fall 2021

Displaying ./code/sternflCode/h6/p04.c

/*


p04.c - In this program, you are given a text file that is currently in all-caps.
		You are to write a program that takes that file, changes all of the
		letters to lowercase, and then just print it to the screen

		You will write a function that converts the characters from uppercase to
		lowercase.

		You will also leave characters that mark the beginning of a sentence
		alone, so in this case you will keep track of not only the current
		character, but the previous two characters.

		So if the previous two characters are either a period and a space, or
		both newlines, you leave the character alone. Otherwise, change it to
		lowercase

		This file is at : /u1/h1/jcompton5/gettysburgAllCaps.txt

*/

#include <stdio.h>

int converttoLowercase(int);

int main(){

        printf("%c\n", converttoLowercase('B'));
}
/*
	int c;  //current character
	int p1 = 0; // the character right before the current character
	int p2 = 0; //the character right before p1

	//use fopen to open the file "/u1/h1/jcompton5/gettysburgAllCaps.txt" for reading

	//loop through all the characters while the current character is not EOF
	while((c = fgetc(f)) != EOF){

		//you will leave the character alone if ONE of the following statements are true
			// p2 is a period '.' AND p1 is a space ' '
			// both p2 AND p1 are newline '\n' characters
			// p1 is a 0 (indicating that we're at the start of the file)
		//if none of these are true, then you will change the character to lowercase

		// Hint: You can write all of the above in one if-else statement,  that
     	// will involve a combination of logical ANDS (&&) and OR's(||) in the
		// conditional statement

		// or you could use a chain involving an if, two else-if's then an else,
		// then you'd just need a logical AND in the conditionals

		// the code will go something like this
		// if above conditions are true
			// use putchar function to put the character on the screen
		// else
			// convert the character to lowercase using the convert function
			// then use putchar to put the converted character on the screen

	    //then make p2 equal p1, and make p1 equal c
		p2 = p1;
		p1 = c;
	}

	return 0;

}
 
*/

//fill out this function
int converttoLowercase(int c){
        if (c>='A' && c<='Z')
             return c+32;
        return c;

	//if c is an uppercase letter character
		//change it to lowercase and return that lowercase value
	// else
		//just return the character, don't convert it.


	// Hint: the number value of a lowercase character is always going to be 32
	// bigger than their uppercase counterpart, so you could just return 32 plus
	// the character, if the character is uppercase.

	// Also, the if statement here will be similar to the one seen in the
	// wordChar function seen in p03.c

}