Adding A Banking Example

BankExample/banking.c

@@ -0,0 +1,210 @@
+#include <stdio.h>
+#define MAX_ITEMS 10
+double balanceUp (double balance, double amount)
+{
+	double at;
+	if (amount >= 0)
+	{
+		at = balance + amount;
+		return at;
+
+	}
+	else
+	{
+		printf("Error");
+return 0;
+	}
+}
+double balanceDown(double balance, double amount)
+{
+	double at;
+	if (amount >= 0)
+	{
+		at = balance - amount;
+		return at;
+
+	}
+	else
+	{
+		printf("Error");
+		return 0;
+	}
+}
+double interestCalc(double balance, double rate)
+{
+	double in;
+	in = balance * (rate / 100);
+//	printf("%f\n", in);
+	return in;
+}
+int main()
+{
+	struct Account {
+		int acc;
+		double bala;
+	};
+	struct Account acct[MAX_ITEMS];
+	acct[0].acc = 11111111;
+	acct[1].acc = 22222222;
+	acct[2].acc = 33333333;
+	acct[3].acc = 44444444;
+	acct[4].acc = 55555555;
+	acct[0].bala = 123.45;
+	acct[1].bala = 12365.50;
+	acct[2].bala = 0;
+	acct[3].bala = 1475;
+	acct[4].bala = 25000.65;
+	float a;
+	double b;
+	float c;
+	float d;
+	float e;
+	double f;
+	int choice, acc;
+	int l = 1;
+	int i;
+	printf("***** Welcome to Savings Account Banking *****\n\n");
+	while (l) {
+		do {
+			printf("1.) Deposit \n");
+			printf("2.) Withdraw\n");
+			printf("3.) Apply monthly interest earnings to all accounts\n");
+			printf("4.) Apply service charges to all accounts\n");
+			printf("5.) Account Summary\n");
+			printf("0.) Log out\n\n");
+			printf("Please enter an option to continue: ");
+			scanf("%d", &choice);
+			if (choice < 0 || choice > 5)
+			{
+				printf("Invalid input, try again: Please select from the following options:\n");
+			}
+		} while (choice < 0 || choice > 5);
+		if (choice == 0)
+		{
+			l = 0;
+		}
+		if (choice == 1)
+		{
+			printf("\n-- Make a deposit --\n\n");
+			printf("Enter account number: ");
+			scanf("%d", &acc);
+			for (i = 0; i < 5; i++)
+			{
+
+				if (acc != acct[i].acc && i == 4)
+					printf("ERROR: Account number does not exist.\n\n");
+				if (acc == acct[i].acc)
+				{
+					printf("Enter amount to deposit (CAD): ");
+					scanf("%f", &a);
+					b = balanceUp(acct[i].bala, a);
+					printf("Current balance is : %.2f\n", b);
+					acct[i].bala = b;
+					break;
+				}
+			}
+			printf("\n");
+			}
+				if (choice == 2)
+				{
+					printf("\n-- Withdraw funds --\n\n");
+					printf("Enter account number: ");
+					scanf("%d", &acc);
+					for (i = 0; i < 5; i++)
+					{
+
+						if (acc != acct[i].acc && i == 4)
+							printf("ERROR: Account number does not exist.\n");
+						if (acc == acct[i].acc)
+						{
+							printf("Enter amount to withdraw (CAD): ");
+							scanf("%f", &e);
+							if (e > acct[i].bala)
+								printf("Withdrawal failed. You only have : %.2f in your account\n",acct[i].bala);
+							else {
+								f = balanceDown(acct[i].bala, e);
+								printf("Current balance is : %.2f\n", f);
+								acct[i].bala = f;
+							}
+							break;
+						}
+
+					}
+					printf("\n");
+				}
+				if (choice == 3)
+				{
+					printf("\n-- Add monthly interest earnings to all accounts --\n\n");
+					printf("Account# New Balance Interest Earnings (M)\n");
+					printf("-------- ----------- ---------------------\n");
+					for (i = 0; i < 5; i++)
+					{
+						if (acct[i].bala <= 500)
+						{
+							c = interestCalc(acct[i].bala, 0.99);
+
+							d = balanceUp(acct[i].bala, c);
+							acct[i].bala = d;
+							printf("%8d %11.2lf %21.2lf\n", acct[i].acc, d, c);
+						}
+						else if (acct[i].bala > 500 && acct[i].bala <= 1500)
+						{
+							c = interestCalc(acct[i].bala, 1.66);
+
+							d = balanceUp(acct[i].bala, c);
+							acct[i].bala = d;
+							printf("%8d %11.2lf %21.2lf\n", acct[i].acc, d, c);
+						}
+						else if (acct[i].bala > 1500)
+						{
+							c = interestCalc(acct[i].bala, 2.49);
+							d = balanceUp(acct[i].bala, c);
+							acct[i].bala = d;
+							printf("%8d %11.2lf %21.2lf\n", acct[i].acc, d, c);
+						}
+					}
+					printf("\n");
+				}
+
+				if (choice == 4)
+				{
+					printf("\n-- Apply service charges to all accounts --\n\n");
+					printf("Account# New Balance Service charges (M)\n");
+					printf("-------- ----------- -------------------\n");					
+for (i = 0; i < 5; i++)
+					{
+						if (acct[i].bala <= 1500)
+						{
+							d = balanceDown(acct[i].bala, 7.50);
+							acct[i].bala = d;
+							printf("%8d %11.2lf %19.2lf\n", acct[i].acc, d, 7.50);
+						}
+						else if (acct[i].bala > 1500)
+						{
+
+							d = balanceDown(acct[i].bala, 2.50);
+							acct[i].bala = d;
+							printf("%8d %11.2lf %19.2lf\n", acct[i].acc, d, 2.50);
+						}
+
+					}
+					printf("\n");
+				}
+
+
+				if (choice == 5)
+				{
+					printf("\n-- Account information --\n");
+					printf("\nAccount# Balance   \n");
+					printf("-------- ----------\n");
+					for (i = 0; i < 5; i++)
+					{
+						printf("%8d %10.2lf\n", acct[i].acc, acct[i].bala);
+
+					}
+					printf("\n");
+				}
+			}
+
+			return 0;
+		}

contributors.md

@@ -44,4 +44,5 @@
 42. [Nitish Kumar](https://github.com/nitish14kumr)
 43. [Seemant Aggarwal] (https://github.com/seemantaggarwal)
 44. [Vibhav Tiwari] (https://github.com/VibhavTiwari)
-45. [Your Name](https://github.com/yourusername)
+45. [Anh Hoai Ung](https://github.com/hoaianhkhang)
+46. [Your Name](https://github.com/yourusername)