1.简述Java中变量的命名规则
2.举例说明在什么情况下会发生自动类型转换
1.首字母只能是 字母 下划线‘_’ ‘ ’ 符号
2.byte b=1;
int i=b;
b是字节类型,自动转换为整形
package zy5;
import java.util.Scanner;
public class yhlx {
public static void main(String[] args) {
System.out.println("请输入本金:");
Scanner money = new Scanner(System.in);
int a=money.nextInt();
double b1=a*0.0225+1000;
double b2=a*0.027*2+1000;
double b3=a*0.0324*3+1000;
double b5=a*0.036*5+1000;
System.out.println("本金为:1000");
System.out.println("");
System.out.println("存取一年后的本息是:"+b1);
System.out.println("");
System.out.println("存取俩年后的本息是:"+b2);
System.out.println("");
System.out.println("存取三年后的本息是:"+b3);
System.out.println("");
System.out.println("存取五年后的本息是:"+b5);
}
}
package zy4;
import java.util.Scanner;
public class wd {
public static void main(String[] args) {
Scanner a = new Scanner(System.in);
System.out.print("当前华氏度:");
double row=a.nextDouble();
int s = (int) ((int)5/9.0*(int)(row-32));
System.out.println("当前华氏度:"+row);
System.out.print("当前摄氏度:"+s);
}
}
package zy3;
public class pk {
public static void main(String[] args) {
int a=10;
int b=8;
int c=a;
System.out.println("输出互换前手中的纸牌");
System.out.println("左手中的纸牌"+a);
System.out.println("右手中的纸牌"+b);
System.out.println("");
System.out.println("输出互换前手中的纸牌");
System.out.println("左手中的纸牌"+b);
System.out.println("右手中的纸牌"+c);
}
}