Thread: Problem with my morse code program

I have just written the morse code program and it seems fine. I just have a little problem. In the query menu, I input 'a' and it works fine, then i input 'b' and it is still fine. But then I do 'a' again then it does not appear right. I think there is some problem with the code that has only 2 characters. Can anybody help me? This is my code

Code:

#include <iostream>
#include <ctime>
#include <cmath>	
#include <string>
#include<cstdlib>
#include<cctype>
#include<cstdio>

using namespace std;

void instruction();
void query();
void practice();
void message();
void setting();
void quit();
void morse();
void flash();


char ch;
char code[6];
char set;
int trial;
double delay = 0.5;

int main()
{
	do
	{
	int choice;
	instruction();
	cin >> choice;
	
	switch (choice)
	{
	case 1:
		query();
		break;
	case 2:
		practice();
		break;
	case 3:
		message();
		break;
	case 4:
		setting();
		break;
	case 5:
		quit();
		break;
	default:
		cout << "Invalid Choice!." << endl;
	}
	}
	while ( set = 'm');

	system("pause");
	return (0);
}

void instruction()
{
  cout<<"MORSE CODE TUTOR" << endl;
  cout<<"~~~~~~~~~~~~~~~~" << endl;
  cout<<"1. Query Mode" << endl;
  cout<<"2. Practie Mode" << endl;
  cout<<"3. Test Message Mode" << endl;
  cout<<"4. Setting" << endl;
  cout<<"5.Exit" << endl;
  cout<<" Enter your choice:" << endl;
}

 void morse()
{	
	switch (toupper(ch)) //run translator
		{
			case '0': strcpy(code,"-----");  break;
			case '1': strcpy(code,".----");  break;
			case '2': strcpy(code,"..---");  break;
			case '3': strcpy(code,"...--");  break;
			case '4': strcpy(code,"....-");  break;
			case '5': strcpy(code,".....");  break;
			case '6': strcpy(code,"-....");  break;
			case '7': strcpy(code,"--...");  break;
			case '8': strcpy(code,"---..");  break;
			case '9': strcpy(code,"----.");  break;
			case 'A': strcpy(code,".-");     break;
			case 'B': strcpy(code,"-...");   break;
			case 'C': strcpy(code,"-.-.");   break;
			case 'D': strcpy(code,"-..");    break;
			case 'E': strcpy(code,".");      break;
			case 'F': strcpy(code,"..-.");   break;
			case 'G': strcpy(code,"--.");    break;
			case 'H': strcpy(code,"....");   break;
			case 'I': strcpy(code,"..");     break;
			case 'J': strcpy(code,".---");   break;
			case 'K': strcpy(code,"-.-");    break;
			case 'L': strcpy(code,".-..");   break;
			case 'M': strcpy(code,"--");     break;
			case 'N': strcpy(code,"-.");     break;
			case 'O': strcpy(code,"---");    break;
			case 'P': strcpy(code,".--.");   break;
			case 'Q': strcpy(code,"--.-");   break;
			case 'R': strcpy(code,".-.");    break;
			case 'S': strcpy(code,"...");    break;
			case 'T': strcpy(code,"-");      break;
			case 'U': strcpy(code,"..-");    break;
			case 'V': strcpy(code,"...-");   break;
			case 'W': strcpy(code,".--");    break;
			case 'X': strcpy(code,"-..-");   break;
			case 'Y': strcpy(code,"-.--");   break;
			case 'Z': strcpy(code,"--..");   break;
			case '.': strcpy(code,".-.-.-"); break;
			case ',': strcpy(code,"--..--"); break;
			case '?': strcpy(code,"..--.."); break;
			case ':': strcpy(code,"---..."); break;
			case '/': strcpy(code,"-..-.");  break;
			case '(': strcpy(code,"-.--.-"); break;
			case ')': strcpy(code,"-.--.-"); break;
			case '-': strcpy(code,"-....-"); break;
			case ' ': strcpy(code,""); break;
			default: strcpy(code," ");
					 cout << "Wrong Input!!" << endl; break;

		}
	flash();
	
}

 void query()
{
	system("cls");
	cout<<"Welcome to the Morse Code Translator." << endl;
	
	while(ch!='=')
	{
	cout << "Enter Character or press = to exit:" << endl;
	cin >> ch;
	
	system("cls");
	morse();
	}
	ch = ' ';
	quit();
	
 }

 void practice()
{
	system("cls");
	srand(time(NULL));
	char words[]={'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 
				  'b', 'c', 'd','e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 
				  'm', 'n', 'o', 'p', 'q', 'r','s', 't', 'u', 'v', 'w', 
				  'x', 'y', 'z', '.', ',', '?', ':', '/', '(',')', '-'};
	float count=0;
	int i;
	int r;
	int temp;
	float number;
	float percentage;
	char guess;
	cout << "How many morse codes you want to practice?" << endl;
	cin >> number;
	system("cls");
	cout << "We will play the code then you will try to identify it. Good luck!" << endl;
	system("pause");
	system("cls");
	while ( trial < number)
	{
	
	for ( i=0; i< number; i++)
	{
		r = rand() % 44;
		ch=words[r];
		morse ();
		cout << code << endl;

		cout << "Enter your guess:" << endl;
		cin >> guess;

		trial++;
		system("cls");
	if( guess == ch)
	{
		count++;
	}
	}
	}
	percentage = (((count/number)*100) + 0.005) ;
	temp = int( percentage * 100);
	percentage = temp/100.0f;
	cout << "Your Percentage is: " << percentage << "%" << endl;
	trial = 0;
	quit();
}
void message()
{
	system("cls");
	int i;
	int j;
	int len;
	string line[6];
	line[0] = "This is a program that is basically about morse code. ";
	line[1] = "The program is written in C plus plus language. ";
	line[2] = "You have 5 options in the menu. ";
	line[3] = "Use them wisely. ";
	line[4] = "Have fun.";
	string sentence;

	for(i=0; i < 6;i++)
	{
		sentence = sentence + line[i];
	}

	cout << "Try to guess the sentence. Good luck!" << endl;
	system("pause");
	system("cls");

	len=sentence.length();

	for(j=0; j < len;j++)
	{
		ch=sentence[j];
		morse();
	}

	system("cls");

	cout << " This is the message: " << endl;
	cout << sentence;

	ch = ' ';
	quit();
}
void setting()
{
	cout << "The default speed is 0.5." << endl;
	cout << "The speed is faster if it is less than 0.5" << endl;
	cout << "The speed is slower if it is more than 0.5" << endl;
	cout << "Enter new speed:" << endl;
	cin >> delay;
	cout << "The new speed has been changed." << endl;
	
}
void quit()
{
	char answer;
	cout << " Want to play again? (Y/N)\n" << endl;
	cin >> answer;

	if( answer == 'y' || answer == 'Y')
	{
		set = 'm';
		cout << "I hope you enjoy it again!" << endl;
		cout << endl;
		system("pause");
		system("cls");
	}
	else if ( answer == 'n' || answer == 'N')
	{
		cout << "Thank you for using my program..." << endl;
		exit(0);
	}
}

void flash()
{
	clock_t cl_start;		// clock_t typedef in time
	clock_t cl_end;			// clock_t = long int
	double elapsed_time;	// for time calculation
	double empty_loop;		// time for empty loop
	int a,b,c,k,n,h;			// dummy variables
	double d,e,f;		// dummy variables

	string line;			// Flash Line
	line = char(219);		// Extended Char Set
	line = line + line + line + line;
	for(h=0; h < 8;h++)
	{
		if ( code[h] == '.')
		{
			cl_start = clock();
			cl_end = clock();
			cout << line << endl << line << endl << line;
			for (k=0; (cl_end-cl_start)<(CLOCKS_PER_SEC*delay);)
			{
				cl_end = clock();
			}
			system("cls");
		}
		else if ( code[h] == '-')
		{
			cl_start = clock();
			cl_end = clock();
			cout << line << endl << line << endl << line;
			for (k=0; (cl_end-cl_start)<(CLOCKS_PER_SEC*delay*3); k++)
			{
				cl_end = clock();
			}
			system("cls");
		}
		else if ( code[h] == ' ')
		{
			cl_start = clock();
			cl_end = clock();
			for (k=0; (cl_end-cl_start)<(CLOCKS_PER_SEC*delay*3); k++)
			{
				cl_end = clock();
			}
		}
	}
}