import java.util.Scanner;
public class Coupon{
public static void main(String[] args) {
System.out.println("***按期存款本息计算***");
System.out.print("请输入您选择的存期(年):");
Scanner input = new Scanner(System.in);
double time = input.nextDouble();
while (time<=0){
System.out.print("输入存期不正确,请从新输入存期(年):");
time = input.nextInt();
}
System.out.print("请输入对应存期的年利率:");
double rate = input.nextDouble();
System.out.print("请输入您的存额为:");
long much = input.nextLong();
while (much<0){
System.out.print("输入存额不正确,请从新输入存额:");
much = input.nextLong();
}
System.out.println("您" + much + "元按期" + time + "年的本息为:" + much*(1+time*rate));
System.out.println("欢迎您下次使用!");
}
}java