C语言经典例题-贷款余额

编程计算第一、第二、第三个月还贷后剩余的贷款金额:
 

# include 

int main()
{
	double amount;//总贷款金额
	double rate;//年利率
	double monthlyPayment;//月还款额
	double firstPayment = 0;//首月贷款余额
	double secondPayment = 0;
	double thirdPayment = 0;
	double monthlyRate = 0.01 * 6.0/12;//月利率

	printf("Enter amount of loan: ");
	scanf("%lf", &amount);
	printf("Enter rate of loan: ");
	scanf("%lf", &rate);
	printf("Enter monthlyPayment of loan: ");
	scanf("%lf", &monthlyPayment);


	firstPayment = amount - monthlyPayment + amount * monthlyRate;
	secondPayment = firstPayment - monthlyPayment + firstPayment * monthlyRate;
	thirdPayment = secondPayment - monthlyPayment + secondPayment * monthlyRate;

	printf("Balance remaining after first payment: %.2fn",firstPayment);
	printf("Balance remaining after second payment: %.2fn", secondPayment);
	printf("Balance remaining after third payment: %.2fn", thirdPayment);
}