C++ Program help

[minaadel1994]

Hi im kinda of a newbie in C++ but i need help... i have made a calculator and inside it a matrix effect... ex: press * for calc , press 2 for matrix... thats the output! ive made a loop for the calc and it works perfectly fine! but in the matrix i have a prob... i cant close it once opened i want a function to return me back to the main page when i press any key.. (tryed system("PAUSE") but it messed up my code ) heres the Code:

#include<iostream>
#include<math.h>
#include<conio.h>
#include<string>
#include<windows.h>
#include<ctime>
using namespace std;
void full()
{
    keybd_event(VK_MENU,0x*8,0,0);
    keybd_event(VK_RETURN,0x*c,0,0);
    keybd_event(VK_RETURN,0x*c,KEYEVENTF_KEYUP,0);
    keybd_event(VK_MENU,0x*8,KEYEVENTF_KEYUP,0);
}
void randChar()    //randChar function
{
           char symbol = rand()%*26+**;
           cout<<symbol<<"\b";}
           void randCharEnd()
           {
                     char symbol = rand()%*26+**;
                     cout<<symbol;}
                     int spaceMaker(int a)
                     {
                          for(int i =0; i<=a; i++)
                          cout<<" ";}int timeWaster (int a)
                          {
                               a = a * *0;
                               for(int i=0; i<= a; i++)
                               cout<<" \b";
}



void matrix()//matrix function
{
     system("COLOR 0A");
     srand((unsigned)time(NULL));
     int lineFeedCtr =0;
     int charCtr;    int clearCtr = 0;    char randChar2;    int ctr;    int spaceCtr = 0;            cout<<"M";    timeWaster(200);    cout<<"I";    timeWaster(200);    cout<<"N";    timeWaster(200);    cout<<"A";    timeWaster(200);    cout<<"'";    timeWaster(200);        cout<<"S ";    timeWaster(200);    cout<<"C";    timeWaster(200);    cout<<"R";    timeWaster(200);        cout<<"E";    timeWaster(200);    cout<<"A";    timeWaster(200);    cout<<"T";    timeWaster(200);    cout<<"I";    timeWaster(200);    cout<<"O";    timeWaster(200);    cout<<"N ";    timeWaster(*00);        cout<<".";    timeWaster(200);    cout<<"..";    timeWaster(200);    cout<<"..";    timeWaster(200);  cout<<"."; timeWaster(200);

cout<<".";    timeWaster(*00);    cout<<".";    timeWaster(*00);     cout<<".";
timeWaster(*00);    cout<<".\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b";    timeWaster(*200);  randChar();  randChar();    randChar();    randChar();       randChar();       randChar();       randChar();       randChar();       randChar();       randChar();       randChar();    randChar();    randCharEnd();    timeWaster(200);        randChar();    randChar();    randChar();    randChar();       randChar();       randChar();       randChar();       randChar();       randChar();       randChar();       randChar();       randChar();       randChar();       randChar();       randChar();       randChar();       randChar();       randChar();    randCharEnd();    timeWaster(*75);        randChar();    randChar();    randChar();    randChar();  randChar(); randChar(); randChar();      randChar();       randChar();       randChar();       randChar();       randChar();       randChar();    randCharEnd(); randCharEnd();    timeWaster(*50);        randChar();    randChar();    randChar();    randChar();    randCharEnd();      randChar();       randChar();       randChar();       randChar();       randChar();       randChar();       randChar();       randChar();       randChar();     timeWaster(*25);        randChar();    randChar();    randChar();       randChar();       randChar();       randChar();       randChar();       randChar();    randChar();    randCharEnd();    timeWaster(*20);          randChar();       randChar();       randChar();       randChar();       randChar();       randChar();     randChar();    randChar();    randChar();    randChar();    randCharEnd();    timeWaster(**0);        randChar();    randChar();    randChar();    randChar();    randCharEnd();    timeWaster(*00);        randChar();    randChar();    randChar();    randChar();    randCharEnd();    timeWaster(*0);        randChar();    randChar();    randChar();    randChar();    randCharEnd();    timeWaster(80);        randChar();    randChar();    randChar();    randChar();    randCharEnd();    timeWaster(70);        randChar();    randChar();    randChar();    randChar();    randCharEnd();    timeWaster(60);        randChar();    randChar();    randChar();    randChar();    randCharEnd();    timeWaster(50);        randChar();    randChar();    randChar();    randChar();    randCharEnd();    timeWaster(50);        randChar();    randChar();    randChar();    randChar();    randCharEnd();    timeWaster(50);        randChar();    randChar();    randChar();    randChar();    randCharEnd();    timeWaster(50);        randChar();    randChar();    randChar();    randChar();    randCharEnd();    timeWaster(50);        randChar();    randChar();    randChar();    randChar();    randCharEnd();    timeWaster(50);        randChar();    randChar();    randChar();    randChar();    randCharEnd();    timeWaster(50);        randChar();    randChar();    randChar();    randChar();    randCharEnd();    timeWaster(50);        randChar();    randChar();    randChar();    randChar();    randCharEnd();    timeWaster(50);        randChar();    randChar();    randChar();    randChar();    randCharEnd();    timeWaster(50);        randChar();    randChar();    randChar();    randChar();    randCharEnd();    timeWaster(50);    randChar();    randChar();    randChar();    randChar(); randChar(); randChar();   randChar(); randChar(); randChar(); randChar(); randChar(); randChar(); randChar(); randChar(); randChar(); randChar(); randChar();  randChar();randChar();randChar();randChar();randChar();randChar();randChar();randChar();randChar();randChar();randChar();randChar();randChar();randChar();randChar();randChar();randChar();randChar();randChar();randChar();randChar();randChar();randChar();randChar();randChar();randChar();randChar();randChar();randChar();randChar();randChar();randChar();randChar();randChar();randChar();randChar();randChar();randChar();randChar();randChar();randChar();randChar();randChar();randChar();randChar();randChar();randChar();randChar();randChar();randChar();randChar();randChar();randChar();randChar();  randCharEnd();    timeWaster(50);     while(***7>0)    {       ctr = 0;       charCtr = rand()%*0+5;       spaceCtr = rand()%75;

if(clearCtr>=280)         {

clearCtr = 0;           }
while(ctr <= charCtr)

{

spaceMaker(spaceCtr);

ctr++;


randChar2 = static_cast<char>(rand()%*26+**);


cout<<randChar2<<endl;

clearCtr++;
for(int b=0; b<=200;b++)
cout<<" \b";
}
 }
}


double calculator()
{
    double x;
    double y;
    char cChar;
    cin>>x>>cChar>>y;
    cin.ignore();
    switch (cChar)
    {
        case '+':
        cout<<"The Answer is: "<< x << " + " << y << " = " <<(x + y) <<endl;
        break;
        case '-':
        cout<<"The Answer is: "<< x << " - " << y << " = " <<(x - y) <<endl;
        break;
        case '/':
        cout<<"The Answer is: "<< x << " / " << y << " = " <<(x / y) <<endl;
        break;
        case '*':
        cout<<"The Answer is: "<< x << " * " << y << " = " <<(x * y) <<endl;
        break;
        case '%':
        cout<<"The Answer is: "<< x << " % " << y << " = " <<(y/*00 *x) <<endl;
        break;
        case '^':
        cout<<"The Answer is: "<< x << " ^ " << y << " = " <<pow(x , y) <<endl;
        break;
    }
}

int main()
{
    full();
    char doa;
    char answer;
    do{
    system("CLS");
    system("TITLE Mina's Calculator 2");
    system("COLOR *");
    cout<<"   *) To Calculate Use These Signs : \n       (+,-,*,/,^,%)  \n    \n   2) To Exit   \n\n   *) To Do The Matrix Effect...  \n"<<endl;
    timeWaster(200);timeWaster(*00);cout<<"\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b"<<endl;
    cin>>answer;
    if (answer=='*')
    {
        cout<<"    ****  U choose calculator... ****\n"<<endl;
        calculator();
    }
    else if (answer=='2')
    {
        Sleep (*);
        timeWaster(250);cout<<"      ***   Exiting in *  ***"<<endl;
        Sleep (2);
        timeWaster(500);cout<<"      ***          2      ***"<<endl;
        Sleep (*);
        timeWaster(500);cout<<"      ***          *      ***"<<endl;
        timeWaster (*00);
        cin.get();
        return 0;
    }
    if (answer=='*')
    {
        cout<<"     ****  U choose the Matrix Effect **** "<<endl;
        matrix();
    }

    cout<<"would u like to restart? y or n? "<<endl;
    cin>>doa;
    cin.ignore();
    }while (doa=='y' ||doa=='Y');
    if (doa=='n' || doa=='N')
    {
        cout<<"         *** Thanks for using my calculator ***      "<<endl;
    }

    cin.get();
   return 0;
}

The output is a full screen console app.. so i need a function to close the matrix when i press any key (or a specific key would be better)...
add this function to my code and repost it plz , thanks in advance