C# 學費折扣 如何計算折扣

Question

例如，如果學費是：3000

現金折扣 : 20% 分期付款 : 5%

總計：（這里）

代碼

int tuition = 0; 
double cash = 0.20; 
double installment = 0.5; 
double discount; double total;

tuition = int.Parse(textBox4.Text); 
cash = double.Parse(textBox1.Text); 

//Computation
discount = tuition * (cash / 100); 
discount = tuition * installment; 
total = tuition - discount; 

textBox5.Text = discount.ToString(); 
textBox3.Text = total.ToString();

Answer 1

將兩個折扣分離為單獨的變量並計算以獲得正確的結果：

//Computation
var cashDiscount = tuition * (cash / 100); 
var installationDiscount = tuition * installment; 
discount = cashDiscount + installationDiscount;
total = tuition - discount; 

textBox5.Text = discount.ToString(); 
textBox3.Text = total.ToString();