Simple code for ATM - C++

#include<iostream>
#include<conio.h>
#include<string>

using namespace std;
class atm
{
   private:
      float balance;
   public:
      atm()
      {
         balance=0;
      }
      void deposit(float a)
      {
         cout<<"Enter amount you want to deposit"<<endl;
         cin>>a;
         balance=balance+a;
      }
      void withdraw(float b)
      {
         cout<<"Enter money you want to withdraw"<<endl;
         cin>>b;
         if(b>balance)
            cout<<"Your balance is not enough to continue transaction"<<endl;
         else
            balance=balance-b;
      }
      float showBalance()
      {
         return balance;
      }
};

void main()
{
   atm ob;
   float y=0,z=0;
   char choice;
   string password="";
   char a;
   cout<<"Enter your password:"<<endl;
   do
   {
      a=_getch();
      switch(a)
      {
         case '\b':     // "\b" is used for BACKSPACE
            if(password.length()>0)
               {
                  password.erase(password.length()-1);
                  cout<<'\b'<<" "<<'\b';
                  break;
               }
         default:
            if(a>31&&a<127)        // 31 to 127 are ASCII code for keyboard keys    
               {
                  password.push_back(a);
                  cout<<"*";
               }
     }
   }
   while(a!='\r');           // "\r" is used for ENTER
   if(password=="tzt")
      {
         cout << "\n^^^^Access granted^^^^ \n";
         cout<<"Your current account balance is 0.\n"<<endl;
         do
         {
            int opt;
            cout<<"Enter 1 if you want to deposit money."<<endl;
            cout<<"Enter 2 if you want to withdraw money."<<endl;
            cin>>opt;
            switch(opt)
               {
                  case 1:
                        ob.deposit(y);
                        break;
                  case 2:
                        ob.withdraw(z);
                        break;
                  default:
                        cout<<"Wrong entry!"<<endl;
                        break;
               }
           cout<<"Your account balance:"<<ob.showBalance()<<endl;
           cout<<"******PRESS******\ny to continue\nn to terminate\n";
           cin>>choice;
        }
       while(choice!='n');
     }
   else
   {
      cout << "\nAccess denied...\n";
   }
   cout<<"*********GOOD BYE*********"<<endl;
   _getch();  
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace simple
{
    class Program
    {
        static void Main(string[] args)
        {
            int a,b,c;
            Console.WriteLine("enter 1st integer\n");
            a = Convert.ToInt16(Console.ReadLine());
            Console.WriteLine("enter 2nd integer\n");
            b = Convert.ToInt16(Console.ReadLine());
            c = a + b;
            Console.WriteLine("sum of {0} and {1} is{2}", a, b, c);
            Console.WriteLine("difference of {0} {1} is {2}", a, b, a - b);
            Console.WriteLine("multiplication of {0} and {1} is {2}", a, b, a * b);
            Console.WriteLine("division of {0} and {1} is {2}", a, b, a / b);
            Console.ReadKey();
        }
    }
}
//TikroSoft

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace chash_test_2
{
    class Program
    {
        static void Main(string[] args)
        {
            int a;
            Console.WriteLine("enter a no");
            a = Convert.ToInt16(Console.ReadLine());
            string myString = (a < 10) ? "less than 10" : "greater than 10";//The Ternary Operator
            Console.WriteLine(myString);
            Console.ReadKey();
        }
    }
}
//TikroSoft

ifelse

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace chash_test_2
{
    class Program
    {
        static void Main(string[] args)
        {
            int a, b;
            string Comp;
            Console.WriteLine("cout 2 no");
            a = Convert.ToInt16(Console.ReadLine());
            b= Convert.ToInt16(Console.ReadLine());
            if (a > b)
            {
                Comp = "is greater than";
                    Console.WriteLine("{0}is {1} {2}",a,Comp,b);
            }else
            {
                Comp = "is less than";
                    Console.WriteLine("{0}is {1} {2}",a,Comp,b);
            }

            Console.ReadKey();

           
        }
    }
}
//TikroSofts

Character Pointer Usng As String

#include<iostream.h>
#include <conio.h>

int main(){
   const int aSize=25;
   char arr[aSize];
   char* pChar;
   int   i = 0;
   int   nameSize;
  
   pChar = arr;
   cout << "Enter a name: ";
  
  for (i=0; i<aSize; i++){
     *(pChar+i)=getch();

     // --- If Enter is pressed, stop copying and break out of the for loop
     if (arr[i] == '\r'){
        cout << endl;
        nameSize=i;    // storing the size of the name
        break;
     } // end if
     cout << arr[i];
  }  // end for - Array arr
  
  // Displaying Array
  cout << endl;
  for (i=0; i<nameSize; i++)
      cout << arr[i];
     
return 0;
} // end main()

Calculator Using Pointers & Parameter pass by Refrence.

#include<iostream.h>

void add(float* , float*);        // function declaration
void sub(float* , float*);        // function declaration
void mul(float* , float*);        // function declaration
void div(float* , float*);        // function declaration

int main(){
    char option;
    float a;
    float b;     
   
    cout << "Choose from the following options: " << endl;
    cout << "+ : Plus" << endl;
    cout << "- : Minus" << endl;
    cout << "* : Multiply" << endl;
    cout << "/ : Divide" << endl;
    cin >> option;
   
    cout << "Enter first number: ";  cin >> a;
    cout << "Enter second number: "; cin >> b;
   
    switch (option){
      case '+':
         add(&a, &b);
         break;
     
      case '-':
         sub(&a, &b);
         break;
     
      case '*':
         mul(&a, &b);
         break;
     
      case '/':
         div(&a, &b);
         break;
     
      default:
         cout << "Wrong option. Run again.";
    } // end switch
   
return 0;
} // end main()

// ========= () ================
void add(float* x, float* y){
   cout << *x << " + " << *y << " = " << ((*x) + (*y));
return;
} 

// ========= () ================
void sub(float* x , float* y) {
   cout << *x << " - " << *y << " = " << ((*x) - (*y));
return;   
}

// ========= () ================
void mul(float* x, float* y){
   cout << *x << " * " << *y << " = " << ((*x) * (*y));
return;
} 

// ========= () ================
void div(float* x, float* y){
   cout << *x << " / " << *y << " = " << ((*x) / (*y));
return;
} 

Using Of Pointers in Functions

/*
  Write a program using pointers to input any number
  and then pass that number to the function which will
  increment the value pointed by that pointer by 1
*/
#include<iostream.h>

void increment(int* p);        // function declaration
int main(){
   int a;
  
   int* p=&a;    // declaring pointer p and intializing it to address of integer a
  
   cout << " Enter a number: ";
   cin >> a;
  
   cout << endl << "You have enetered: " << a << endl;
  
   increment(p);
  
   cout << endl << "Value after incrementing is: " << a << endl;
  
   // Another way to call for function is to send the address like below
  
   increment(&a);
  
   cout << endl << "Value after second increment is: " << a << endl;
         
return 0;
} // end main()

// ========= increment() ================
void increment(int* p1){
   (*p1)++;
return;
} // end increment()

Adding of Two Integers Using Pointers

#include<iostream.h>

int main(){
   int a = 55;
   int b = 33;
  
   int* p1;
   int* p2;
  
   p1 = &a;    // initializing p1 to address of integer a  
   p2 = &b;    // initializing p1 to address of integer b  
  
   // Adding using integers.
  
   cout << a << " + " << b << " = " << (*p1 + * p2);
        
return 0;
} // end main()