java22班姜佳良的作业

##2018-12-8课后作业
#1.

	
		

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		
		for(int i = 100 ; i > 0; i = i-5) {
			System.out.print(i+" ");
		}
		
		/*while(i>0) {
			System.out.print(i+" ");
			i = i - 5;
			
			
		}*/
		

	}

}

#2

	public static void main(String[] args) {
		// 编程计算1-50中是7的倍数的数值之和
		int sum = 0;
		for(int i = 50 ; i > 0 ; i--) {
			if( i % 7 == 0) {
				
				sum += i;
			}
		}
		System.out.println("1-50中是7的倍数的数值之和为："+sum);

	}

}

#3

// 输入一批整数。输出其中的最大值和最小值，输入0结束结束循环，程序运行结果
		Scanner input  = new Scanner(System.in);
		System.out.print("请输入一个数(输入0是结束循环)：");
		int num = input.nextInt();
		int max = num;
		int min = num;
		
		while(true) {
			if (num == 0) {
				System.out.println("程序结束");
				break;
				
			}
			if(num > max) {
				max = num;
			}
			if(num < min) {
				 min = num;
			}
			System.out.print("输入一个数(输入0时结束循环)：");
			num = input.nextInt();
		}
		System.out.println("最大"+max+"最小"+min);

	}

}

#4

// 从键盘上输入一个整数，当输入1-7是，显示对应的英文星期缩写。
		
		String day = "";
		Scanner input = new Scanner(System.in);
		System.out.println("请输入1到7的数字");
		int x = input.nextInt();
		while(x != 0) {
			System.out.println("请输入1-7的数字：");
			switch(x) {
			case 1 :day = "MON";break;
			case 2 :day = "TUE";break;
			case 3 :day = "WED";break;
			case 4 :day = "THD";break;
			case 5 :day = "FRI";break;
			case 6 :day = "SAT";break;
			case 7 :day = "SUN";break;
			
			}
			System.out.println("今天是："+day);
			x = input.nextInt();
		}
		
				

	}

}