How to create a simple ATM Machine in C programming


Whether you are looking for an ATM Machine code in C++ or in C programming, the concept is the same. Under this walkthrough, we are going to see how to create a simple ATM Machine in C programming language. C programming is perfect for beginners and hence our choice to create an ATM Machine program. I had initially created an ATM machine using java programming language, applying the same concept used here. It’s essential for you to have some simple basics of C programming before proceeding.

How to create a simple ATM MACHINE using C programming Language

In our program, we are going to apply 4 basics concept of every ATM MACHINE as shown below:

  1. Withdraw
  2. Deposit
  3. Balance Check
  4. Another transaction functionality for example, “Do you need another transaction? press 1 to prceed, press 2 to exit”. This is to enable multi-transaction in our program, in short, program to be terminated only when user is satisfied

To accomplish above concepts, we must use switch statement, to allow user to select required options. SWitch statement in C programming are simple to use.



C PROGRAMMING ATM MACHINE CODE

Following is our C programming ATM code, which is simple to use. In case everything is not clear to you, please feel free to ask any question in the commenting system below.

#include <stdio.h>

float balance = 0; // intial balance to be zero for everyone 
int anotherTransaction; 


void transaction(){
	int choice; 
	printf("Enter any option to be served!\n\n");
	printf("1. Withdraw\n"); 
	printf("2. Deposit\n"); 
	printf("3. Balance\n");
	scanf("%d",  &amp;choice); 
	
	switch(choice){
		case 1:
		// first option should be withdraw
		int amountToWidthdraw; 
		printf("Please enter amount to withdraw: "); 
		scanf("%d", &amp;amountToWidthdraw); 
		if(amountToWidthdraw > balance){
			printf("There is no insuffient funds in your account"); 
			// ask them for another transaction
			printf("\n\nDo you want another transaction?\nPress 1 to proceed and 2 to exit\n\n"); 
			scanf("%d", &amp;anotherTransaction); 
			if(anotherTransaction == 1){
				// call our transaction method here
				transaction();
			}
		} else {
			// this means account has something
			// so withdraw amount and update the balance variable 
			balance = balance - amountToWidthdraw; 
			
			printf("You have withdrawn %d and your new balance is %f ", amountToWidthdraw, balance);
			
			// request for another transaction
			printf("\n\nDo you want another transaction?\nPress 1 to proceed and 2 to exit\n\n"); 
			scanf("%d", &amp;anotherTransaction); 
			if(anotherTransaction == 1){
				// call our transaction method here
				transaction();
			}
			
			
		}
		break; 
		
		case 2:
		// DEPOSIT
		
		int amountToDeposit; 
		printf("Please enter amount to deposit: "); 
		scanf("%d", &amp;amountToDeposit); 
		// now that you have deposited something, update the balance variable
		
		balance = amountToDeposit + balance; 
		
		printf("Thank you for depositing, new balance is: %f", balance); 
		
		// request for another transaction
			printf("\n\nDo you want another transaction?\nPress 1 to proceed and 2 to exit\n\n"); 
			scanf("%d", &amp;anotherTransaction); 
			if(anotherTransaction == 1){
				// call our transaction method here
				transaction();
			}
		
		break; 
		
		case 3:
		
		// BALANCE
		printf("Your bank balance is: %f", balance); 
		
		// request for another transaction
			printf("\n\nDo you want another transaction?\nPress 1 to proceed and 2 to exit\n\n"); 
			scanf("%d", &amp;anotherTransaction); 
			if(anotherTransaction == 1){
				// call our transaction method here
				transaction();
			}
		
		break;
	}
	
}



int main(){
	
	// let's try to run our application and see if it's working, please
	
	transaction();
	
	return 0;
}


Video on how to create ATM MACHINE using C Programming