Java计算器程序中do-while循环的执行
在我的Java程序中,我使用了一个布尔变量'decision',它应该只在变量为true时执行'do loop code block'中的实际计算器代码,但即使在决策变量为false时,do while循环也会执行。我正在使用EclipseIDEforJava和JDK10(都是最新版本)。请帮我找个解决办法。代码如下Java计算器程序中do-while循环的执行,java,calculator,do-while,Java,Calculator,Do While,在我的Java程序中,我使用了一个布尔变量'decision',它应该只在变量为true时执行'do loop code block'中的实际计算器代码,但即使在决策变量为false时,do while循环也会执行。我正在使用EclipseIDEforJava和JDK10(都是最新版本)。请帮我找个解决办法。代码如下 import java.util.Scanner; public class apples { public static void main(String[] args) {
import java.util.Scanner;
public class apples {
public static void main(String[] args) {
int option,a,b,c;
boolean decision;
System.out.println("We are here to create a calculator");
System.out.print("Do you want to switch on the calculator:");
Scanner yogi = new Scanner(System.in);
decision = yogi.nextBoolean();
do {
System.out.println("Following operations are available to perform:");
System.out.println("1. Addition");
System.out.println("2. Subtraction");
System.out.println("3. Multiplication");
System.out.println("4. Division");
System.out.print("Enter the operations do you want to perform:");
option = yogi.nextInt();
System.out.println("Choice of operation is:"+option);
switch(option) {
case 1:
System.out.println("Enter two numbers to be added:");
a = yogi.nextInt();
b = yogi.nextInt();
c = a + b;
System.out.print("Addition:"+c);
break;
case 2:
System.out.println("Enter two numbers to be subtracted:");
a = yogi.nextInt();
b = yogi.nextInt();
c = a - b;
System.out.print("subtracted:"+c);
break;
case 3:
System.out.println("Enter two numbers to be multiplied:");
a = yogi.nextInt();
b = yogi.nextInt();
c = a * b;
System.out.print("multiplied:"+c);
break;
case 4:
System.out.println("Enter two numbers to be divided:");
a = yogi.nextInt();
b = yogi.nextInt();
c = a / b;
System.out.print("divided:"+c);
break;
default:
System.out.println("This is a wrong choice");
break;
}
}while(decision==true);
}
}
即使决策变量
是假的
do…while
将在检查条件之前执行主体一次
修改
的while
代码或添加if-else
包含do…while
您可以添加另一个案例5
并在该写入系统中。退出(0)
以成功终止程序
在中,同时零件传递(选项!=5)
。这将运行程序。
您不需要决策变量 您可以使用if/else来确定是否要执行循环。或者您只需更改为使用纯while循环。这就是所做的。..while
循环的用途。正文将至少执行一次。使用一段时间,谢谢大家的建议和修复。帮助了我。问题解决了!谢谢大家的建议和修正。帮助了我。问题解决了!