在我的Java程序中,我使用了一个布尔变量“decision”,只有在变量为true时才应该执行“do循环代码块”中的实际计算器代码,但是即使决策变量为false,do while循环仍然会被执行。我正在使用Java的Eclipse集成开发环境和JDK 10(这两个都是最新版本)。请帮我找出解决方案。以下是代码:
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);
}
}
do..while
循环的作用。循环体至少会被执行一次。使用 while 循环。 - Thiyagu