// Copyright 1999
// College of Computer Science
// Northeastern University Boston MA 02115

// This software may be used for educational purposes as long as this copyright
// notice is retained at the top of all files

// Should this software be modified, the words "Modified from Original" must be
// included as a comment below this notice

// All publication rights are retained.  This software or its documentation may
// not be published in any media either in whole or in part.

///////////////////////////////////////////////////////////////////////////////

//	Recitation 5:	Using and writing conditional statements; logical expressions

//	STUDENT NAME:	¥?¥?¥
//	STUDENT ID:		¥?¥?¥
//	DATE:			¥?¥?¥

///////////////////////////////////////////////////////////////////////////////

// The standard include files that include traditional C and C++ headers and
// many other Core Tools headers ... see CHeaders.h for additional details

#include "IOTools.h"
#include "Graphics.h"
#include "Random.h"

// Enter project specific include files here as well as classes and functions
// that you choose to define in the main shell rather than in separate files

// prototypes

void Exercise1();
void Exercise2();
void Exercise3();
void Exercise4();
void Exercise5();
void Exercise6();
void Exercise7();
void Exercise8();
void Exercise9();
void Exercise10();

 
// Recitation 5: EXERCISES

// definitions

void Exercise1(){
// Ask the user to type in a string
// Print the string backwards

	cout << "Print the string backwards" << endl;

	string s;								// get the string
	RequestString("Type in a sentence:", s);

	int len = s.length();					// remember its length
	int i;

	for (i = 0; i < len; i++){				// traverse the string
		cout << s[len - 1 - i];				// i-th character from the end
	}
	
	cout << endl;							// final end-line

};

void Exercise2(){
// Palindrome is a word that is the same when read backwards
// Some examples are: ewe, anna, hannah, lonelytylenol
// Write a program that will read a string and print appropriately
// "This is a palindrome" or "This is not a palindrome"


};

int FirstChar(const string s, char c){
// Return the location of the first occurrence of the given character 
// in the given string
// If it is not found, return -1

	int len = s.length();				// get the length of the string
	int i;
	for(i = 0; i < len; i++){
		if (s[i] == c){					// if the character is found,
			return i;					// return its location
		}
	}

	// character not found
	return -1;

};

void Exercise3(){
// Write a function FirstChar that uses two arguments - a string s and a char c
// and returns the position of the first occurrence of char c in the string s
// Write a program that will test this function five times.


	cout << "Type in a string and a character to find" << endl;
	cout << "Program will locate thhe first occurrence of this letter." << endl;

	string test;						// string to run the test on
	char c;								// character to find
	int n;								// loop counter for three tests

	for (n = 1; n <= 3; n++){

		RequestString("Next string: ", test);		// get the string
		c = RequestChar("The character to find:");	// and the char to find

		// print the message
		cout << "Letter " << c << " found at location ";
		cout << FirstChar(test, c) << endl;			// calling FirstChar function

	}

};

void Exercise4(){
// Write a function that will return the location of the first letter
// (i.e. 'a' through 'z' or 'A' through 'Z')
// in a string typed in by the user

// Write a program that will test this function

};

void Exercise5(){
// Write a function that will count the number of occurrences of a given
// character in a given string
// Test this function


};

void Exercise6(){
// Ask the user to type in a string
// Print the first letter of every word in this string
// (Try it with the sentence: Your eyes seems so incredibly red)

	cout << "This program will print the first letter of every word" << endl;
	cout << "in the string that you type in." << endl;

	string s;								// get the string and its length
	RequestString("Type in a sentence:", s);
	int len = s.length();

	int i = 0;								// index for the string traversal

	while (i < len){						// traversing till the end of the string

		// look for the next non-space
		while ((i < len) && (s[i] == ' ')){
			i++;
		};

		// print it
		if (i < len)
			cout << s[i];

		// look for the next space
		while ((i < len) && (s[i] != ' ')){
			i++;
		};

	}; // end of the 'big' while loop
};

void Exercise7(){
// Write a program that will count the words in a string.

};

void Exercise8(){
// Write a program that will compute the average length of a word

};

void Exercise9(){
// Write a program that will replace every occurrence of a space
// with a *

};

void Exercise10(){
// Write a program that will replace every letter of a string
// with its successor

	cout << "We will encrypt your message!" << endl;

	string s;									// get the message to encrypt
	RequestString("Type in your message:", s);
	int len = s.length();						// remember its length
	int i;										// loop counter
	char c;										// encrypted character

	for (i = 0; i < len; i++){					// look at every letter in the string
		c = s[i] + 1;							// set c to its successor
		cout << c;								// and print it
	}

	cout << endl;

};


int main(int argc, char* argv[]) {

	// Use the following line if you choose NOT to open any graphics windows
	// InitializeConsole();

	// Build graphics window 0
	GraphicsWindow GW0(300, 300);

	// Move the console below graphics window 0
	ConsolePlaceBelow(0);

	// Give the console the focus for user interaction
	MakeConsoleForeground();

//////////

	// Enter the main program here
	SetRandomSeed();

	int i = 1;
	
	while (Confirm("Another exercise?", true)){		// loop to run another exercise
		i = RequestInt("Exercise number: ", i);		// determine which exercise to run
													// the default moves you to the next one
		cout << endl << "Exercise " << i << endl;	// notify user of the accepted selection
		switch (i){									// un the appropriate exercise
			case 1: {
					Exercise1();
					break;
					}
			case 2: {
					Exercise2();
					break;
					}
			case 3: {
					Exercise3();
					break;
					}
			case 4: {
					Exercise4();
					break;
					}
			case 5: {
					Exercise5();
					break;
					}
			case 6: {
					Exercise6();
					break;
					}
			case 7: {
					Exercise7();
					break;
					}
			case 8: {
					Exercise8();
					break;
					}
			case 9: {
					Exercise9();
					break;
					}
			case 10: {
					Exercise10();
					break;
					}
			default:
					Exercise1();
		
		};
		i = (i+1);									// next time, continue with the next exercise
		if (i > 10)									// we only have 10 exercises - cycle through again
			i = 1;
		cout << endl;

	}
	
//////////

	// The lines below make sure that the graphics windows remain open just
	// before the program terminates

	PressReturn("\nThe main program is about to terminate\n");

	return 0;
}