使用条件结构从键盘输入一个月份,打印输出对应的季节(3~5月为春天)
import java.util.Scanner;
public class D6{
public static void main (String[] args){
Scanner scan = new Scanner(System.in);
System.out.println("输入一个月份(1~12)");
int x=scan.nextInt();
if(x>=3&&x<=5 ){
System.out.println("春");
}else if(x<=8&&x>=6){
System.out.println("夏");
}else if(x>=9&&x<=11){
System.out.println("秋");
}else {
System.out.println("冬");
}
}
}
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从控制台输入三个整数,按照从小到大的顺序输出
import java.util.Scanner;
public class ForCircle {
public static void main (String[] args){
Scanner scan = new Scanner(System.in);
int[] str = new int[3];
for(int i = 0 ; i < 3 ; i ++){
System.out.println("请输入第"+(i+1)+"个整数");
str[i] = scan.nextInt();
}
for(int x=0 ; x < str.length-1 ; x++){
for(int y=0;y < str.length-x-1 ; y++ ){
int temp;
if (str[y]>=str[y+1]){
temp=str[y+1];
str[y+1]=str[y];
str[y]=temp;
}
}
}
System.out.print("num3:"+str[2]+" "+"num2"+str[1]+" "+"num1:"+str[0]);
}
}
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从键盘输入年和月,判断该年是否为闰年,并输出对应月份的天数
import java.util.Scanner;
public class D{
public static void main (String[] args){
Scanner scan = new Scanner(System.in);
int i=0;
System.out.println("请输入年份:");
int year = scan.nextInt();
System.out.println("请输入月份:");
int month = scan.nextInt();
if((year%400==0) || (year%4==0 && year%100!=0)) {
System.out.println(year+"是闰年");
}else{
System.out.println(year+"是平年");
i=1;
}
switch(month ){
case 1: System.out.println(month +"月有31天");
break;
case 2: if(i==0) {
System.out.println(month +"月有29天");
break;
}else{
System.out.println(month +"月有28天");
break;
}
case 3: System.out.println(month +"月有31天");
break;
case 4: System.out.println(month +"月有30天");
break;
case 5: System.out.println(month +"月有31天");
break;
case 6: System.out.println(month +"月有30天");
break;
case 7: System.out.println(month +"月有31天");
break;
case 8: System.out.println(month +"月有31天");
break;
case 9: System.out.println(month +"月有30天");
break;
case 10: System.out.println(month +"月有31天");
break;
case 11: System.out.println(month +"月有30天");
break;
case 12: System.out.println(month +"月有31天");
break;
default: System.out.println("输入错误");
}
}
}
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