Program that convert ascii values to its character and upper case alphabets to lower case alphabets and vice versa

#include "stdafx.h"

#include "conio.h"

#include "stdio.h"

#include "iostream"

using namespace std;

void AsciiValue();

void Character();

void LowerToUpper();

void UpperToLower();

int _tmain(int argc, _TCHAR* argv[])

{

       int choice;

       char option;

       do

       {

              cout<<"press 1 to convert ascii value to character"<<endl;

              cout<<"press 2 to convert character to ascii value"<<endl;

              cout<<"press 3 to conver alphabet from lower to upper case"<<endl;

              cout<<"press 4 to conver alphabet from upper to lower case"<<endl;

              cout<<"press 5 for exit"<<endl;

              cout<<"enter your choice"<<endl;

              cin>>choice;

              switch(choice)

              {

              case 1:

                     AsciiValue();

                     break;

              case 2:

                     Character();

                     break;

              case 3:

                     LowerToUpper();

                     break;

              case 4:

                     UpperToLower();

                     break;

              case 5:

                     exit(0);

              default:

                     cout<<"nothing match";

              }

              cout<<"would u like to continue?";

              cin>>option;

       }while(option=='y'||option=='Y');

              getch();

}

void AsciiValue()

{

       char ch;

       int a;

       cout<<"enter a character"<<endl;

       cin>>ch;

       a=ch;

       cout<<a<<endl;

}

void Character()

{

       int a;

       cout<<"enter a number"<<endl;

       cin>>a;

       cout<<(char)a<<endl;

}

void LowerToUpper()

{

       char ch;

       int a;

       cout<<"enter a character in lower case";

       cin>>ch;

       a=ch-32;

       cout<<(char)a;

       getch();

}

void UpperToLower()

{

       char ch;

       int a;

       cout<<"enter a character in upper case";

       cin>>ch;

       a=ch+32;

       cout<<(char)a;

       getch();}