|
if,if...else...一定可以体会switc
|
switch不一定能替换if,if...else...
import java.util.Scanner;
public class Dome1{
public static void main (String []args ){
Scanner input = new Scanner (System.in );
int day =0;
System.out.print("请输入你的成绩:");
day = input.nextInt();
if(day>100||day <0){
System.out.print("输入成绩错误");
}
else{
day=day/10;
switch(day){
case 10:System.out.print("A");break;
case 9:System.out.print("B");break;
case 8:System.out.print("C");break;
case 7:System.out.print("D");break;
case 6:System.out.print("E");break;
default:System.out.print("不及格");
}
}
}
}
|
|
... ...
if(day == 1) System.out.println(“星期1”);
else if(day == 2) System.out.println(“星期2”);
else if(day == 3) System.out.println(“星期3”);
else if(day == 4) System.out.println(“星期4”);
else if(day == 5) System.out.println(“星期5”);
else if(day == 6) System.out.println(“星期6”);
else if(day == 7) System.out.println(“星期日”);
else System.out.println(“输入错误！”);
... ...
|
... ...
switch(day){
case 1: System.out.println("星期一"); break;
case 2: System.out.println("星期二"); break;
case 3: System.out.println("星期三"); break;
case 4: System.out.println("星期四"); break;
case 5: System.out.println("星期五"); break;
case 6: System.out.println("星期六"); break;
case 7: System.out.println("星期日"); break;
default: System.out.println("输入错误！");
}
... ...
|
