2月22日 Core Java 周四

package work03;

import java.util.Scanner;

public class Add {

public static void main(String[] args) {

Scanner sc = new Scanner(System.in);

System.out.println("请输入第一个整数:");
int aaa = sc.nextInt();
System.out.println("请输入第二个整数:");
int bbb = sc.nextInt();
sc.close();

System.out.println("num1 = "+aaa);
System.out.println("num2 = "+bbb);
System.out.println("num1 + num2 = "+(aaa+bbb));
System.out.println("num1 - num2 = "+(aaa-bbb));
System.out.println("num1 * num2 = "+(aaa*bbb));
System.out.println("num1 / num2 = "+(aaa/bbb));

}

}

package work03;

import java.util.Scanner;

public class Add2 {

public static void main(String[] args) {

Scanner sc = new Scanner(System.in);

System.out.println("请输入一个四位数:");
int aaa = sc.nextInt();
sc.close();

int a = aaa%10;
int b = aaa/10%10;
int c = aaa/100%10;
int d = aaa/1000%10;

System.out.println(aaa+"各位数字之和为"+(a+b+c+d));

}

}

package work03;

import java.util.Scanner;

public class Add3 {

public static void main(String[] args) {

Scanner sc = new Scanner(System.in);

System.out.print("输入一个数字:");
int aaa = sc.nextInt();
sc.close();

if(aaa==1){
System.out.println("吃烤鸭");
}
else if(aaa==2){
System.out.println("KFC");
}
else if(aaa==3){
System.out.println("涮火锅");
}
else{
System.out.println("吃烤鸡翅膀");
}
}

}

package work03;

import java.util.Scanner;

public class Add4 {

public static void main(String[] args) {
Scanner sc = new Scanner(System.in);

System.out.println("请输入一个[0-100]之间的分数");
int aaa = sc.nextInt();
sc.close();

if(aaa>=90){
System.out.println("A");
}else if(aaa>=80){
System.out.println("B");
}else if(aaa>=70){
System.out.println("C");
}else if(aaa>60){
System.out.println("D");
}else{
System.out.println("E");
}

}

}

package work03;

import java.util.Scanner;

public class Add5 {

public static void main(String[] args) {

Scanner sc = new Scanner(System.in);

System.out.println("请输入第一个数:");
int aaa = sc.nextInt();
System.out.println("请输入第二个数:");
int bbb = sc.nextInt();
System.out.println("请输入运算符:");
String ccc = sc.next();

sc.close();

switch (ccc) {
case "+":System.out.println("aaa+bbb="+(aaa+bbb));

break;
case "-":System.out.println("aaa-bbb="+(aaa-bbb));

break;
case "*":System.out.println("aaa*bbb="+(aaa*bbb));

break;
case "/":System.out.println("aaa/bbb="+(aaa/bbb));

break;
default:
break;
}

}

}

package work04;

import java.util.Scanner;

public class Num {

public static void main(String[] args) {

Scanner sc = new Scanner(System.in);

System.out.println("1-100之间的所有奇数:");
for(int i=1;i<=100;i+=2){
System.out.print(" "+i);
}
System.out.println();

System.out.println("1-100之间的所有偶数:");
for(int i=2;i<=100;i+=2){
System.out.print(" "+i);
}
System.out.println();

System.out.println("输入一个数判断位数:");
int aaa = sc.nextInt();
sc.close();

if(aaa<10){
System.out.println("个位数");
}else if(aaa<100){
System.out.println("十位数");
}else if(aaa<1000){
System.out.println("三位数");
}else if(aaa<10000){
System.out.println("四位数");
}else if(aaa<100000){
System.out.println("五位数");
}else if(aaa<1000000){
System.out.println("六位数");
}else if(aaa<10000000){
System.out.println("七位数");
}else{
System.out.println("N位数");
}

int sum = 0;
for(int i=0;i<=100;i++){
sum+=i;
}
System.out.println("1-100所有数据之和为:"+sum);

int p = 0;
int bbb=0;
for(int i=1;i<=500;i++){
if(i%13==0){
if(i%2==0){
p++;
if(p==3){
bbb=i;
}
}
}
}
System.out.println("1-500之间能被13整除的第三个偶数是:"+bbb);
}

}

不明白痛苦的滋味幸福也会变得素然无味。

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