Java学习~Three

条件语句

1.if语句

package exampleIf;

public class IfBuyticketDemo {
       public static void main(String[] args) {
    	   double childhight = Double.parseDouble(args[0]);//定义儿童身高并获取参数值
    	   if(childhight>110) {
    		   System.out.println("该儿童的身高为:"+childhight);
    		   System.out.println("国家免费标准:110");
    		   System.out.println("需要买票");		   
    	   } 
    	   if(childhight>110) 
    		   System.out.println("身高超过免票标准,需要购票");
    	   if(childhight<110) {
    		   System.out.println("该儿童的身高为:"+childhight);
    		   System.out.println("国家免费标准:110");
    		   System.out.println("不需要买票");
    	   }
    	   if(childhight<110)
    		   System.out.println("身高没有超过免票标准,不需要购票");
       }
}

2.if-else语句

package exampleIfElse;

public class IfElseTicketDemo {
	 public static void main(String[] args) {
		 double childhight = Double.parseDouble(args[0]);//定义儿童身高并获取参数值
		 if(childhight>110)
		 {
		   System.out.println("该儿童的身高为:"+childhight);
  		   System.out.println("国家免费标准:110");
  		   System.out.println("需要买票");		
		 }
		 else {
		   System.out.println("该儿童的身高为:"+childhight);
  		   System.out.println("国家免费标准:110");
  		   System.out.println("不需要买票");
		 }
	 }
}

3.if-else-if语句

package exampleIfElseIf;

public class IfElseIfTicketDemo {
	  public static void main(String[] args) {
		  double childhight = Double.parseDouble(args[0]);//定义儿童身高并获取参数值
		  System.out.println("儿童免票标准:110cm");
		  System.out.println("儿童身高:"+childhight+"cm");
		  if(childhight>140)
		  {
			  System.out.println("需要买全票");
		  }
		  else if(childhight>110) {
			  System.out.println("需要买半价票");
		  }
		  else {
			  System.out.println("不需要买票,免票");
		  }
	  }
}

项目地址https://download.csdn.net/download/qq_40843903/10614536

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转载自blog.csdn.net/qq_40843903/article/details/81865541