②public class OperatorsAndExpressions {
void priorityOfBitOperator(){
int x = -67,y = 116,z = 78;
int d = a^b&c;
System.out.println("d =" +d);
}
pubilc static void main(String args[]){
OperatorsAndExpressions OperAndExp = new OperatorsAndExpressions();
OperAndExp.stringPlus();
}
}
(答案是-7,我不会算负数,我只会死板的往正数算,再说考试也没那么多时间,我算的是249,要是填空题(全国计算机2级java)的话,我写正数不会给扣分的吧????)
④求n!算法 (高手帮忙写一个出来好吗?跪谢了)⑤将1W元RMB按6种年利率存入银行。列出10年内,每年每种利率的存款余额。
import java.text.*;
import javax.awing.*;
public class Compoundlnterest
{ public static void main(String[] args)
{ final int STARTRATE = 10;
final int NRATES = 6;
final int NYEARS = 10;
double[] interestRate = new double[NRATES];
for(int j = 0;j < interestRate.length;j++) //...
interestRate[j] = (STARTRATE + j)/100.0; //...
double[][]balance = new double[NYEARS][NRATES];
for(int j = 0;j < balance[0].length;j++)
for(int i = 1;i < balance.length;i++)
{ for(int j = 0;j < balance[i].length;j++)
{ double oldBalance = balance[i - 1][j];
double interest = oldBlance * interestRate[j];
balance[i][j] = oldBlance + interest;
}
}
NumberFormat formatter = NumberFormat.getPercentInstance();
for(int j = 0;j < interestRate.length;j++)
{System.out.print(" ");
System.out.print(formatter.format(interestRate[j]));
}
System.out.print();
formatter = NumberFormat.getCurrencyInstance();
for(int i = 0;i < balance.length;i++)
{ for(int j = 0;j <balance[i].length;j++)
{ System.out.print(" ");
System.out.print(formatter.format(balance[i][j]));
}
System.out.print();
}
}
帮忙分析下每一句好吗?在“//”后面注释下,谢谢了
⑥class A{
public static int size; //定义外部类局部变量
public class Inner{ //声明内部类
private int size;
pubilc void doSomething(int y){
size++; //访问局部变量
this.size++; //访问内部类的成员变量
A.this.size++; //访问外部类的成员变量
System.out.println(size+" "+this.size+" "+A.this.size);
}
}
public void taskInner(){
Inner k = new Inner();
k.doSomething(8);
}
public static void main(String[] args){
A i=new A();
i.taskInner();
}
}
后面一段是什么意思(倒数第二个public开始)?帮忙分析一下好吗?没弄清楚要什么结果?没弄懂...
void priorityOfBitOperator(){
int x = -67,y = 116,z = 78;
int d = a^b&c;
System.out.println("d =" +d);
}
pubilc static void main(String args[]){
OperatorsAndExpressions OperAndExp = new OperatorsAndExpressions();
OperAndExp.stringPlus();
}
}
(答案是-7,我不会算负数,我只会死板的往正数算,再说考试也没那么多时间,我算的是249,要是填空题(全国计算机2级java)的话,我写正数不会给扣分的吧????)
④求n!算法 (高手帮忙写一个出来好吗?跪谢了)⑤将1W元RMB按6种年利率存入银行。列出10年内,每年每种利率的存款余额。
import java.text.*;
import javax.awing.*;
public class Compoundlnterest
{ public static void main(String[] args)
{ final int STARTRATE = 10;
final int NRATES = 6;
final int NYEARS = 10;
double[] interestRate = new double[NRATES];
for(int j = 0;j < interestRate.length;j++) //...
interestRate[j] = (STARTRATE + j)/100.0; //...
double[][]balance = new double[NYEARS][NRATES];
for(int j = 0;j < balance[0].length;j++)
for(int i = 1;i < balance.length;i++)
{ for(int j = 0;j < balance[i].length;j++)
{ double oldBalance = balance[i - 1][j];
double interest = oldBlance * interestRate[j];
balance[i][j] = oldBlance + interest;
}
}
NumberFormat formatter = NumberFormat.getPercentInstance();
for(int j = 0;j < interestRate.length;j++)
{System.out.print(" ");
System.out.print(formatter.format(interestRate[j]));
}
System.out.print();
formatter = NumberFormat.getCurrencyInstance();
for(int i = 0;i < balance.length;i++)
{ for(int j = 0;j <balance[i].length;j++)
{ System.out.print(" ");
System.out.print(formatter.format(balance[i][j]));
}
System.out.print();
}
}
帮忙分析下每一句好吗?在“//”后面注释下,谢谢了
⑥class A{
public static int size; //定义外部类局部变量
public class Inner{ //声明内部类
private int size;
pubilc void doSomething(int y){
size++; //访问局部变量
this.size++; //访问内部类的成员变量
A.this.size++; //访问外部类的成员变量
System.out.println(size+" "+this.size+" "+A.this.size);
}
}
public void taskInner(){
Inner k = new Inner();
k.doSomething(8);
}
public static void main(String[] args){
A i=new A();
i.taskInner();
}
}
后面一段是什么意思(倒数第二个public开始)?帮忙分析一下好吗?没弄清楚要什么结果?没弄懂...
* @param args
*/
public static int qiuJieCheng(int i){
int jieguo = 1;
if(i != 0){
jieguo = i*qiuJieCheng(i-1);
}
return jieguo;
}
public static void main(String[] args) {
// TODO Auto-generated method stub
int n = -1; //可以改为自己输入
if(n < 0){
System.out.println("请输入一个大于0的数...");
}else if(n == 0){
System.out.println("结果为: 0.");
}else{
System.out.println("结果为: "+qiuJieCheng(n));
} }}
int d = a^b&c;
上面是x,y,z,下面怎么成了a,b,c了?
if(n<0) {
System.out.print("请输入一个大于零的数");
return -1;
} else if((n==0||n==1)) {
return 1;
} else {
return n*test(n-1);
}
}
public static void main(String[] args) {
System.out.print(test(10));
}
int d = a^b&c;按这个来吧.
a:
原码:1000 0000 0000 0000 0000 0000 0100 0011
反码:1111 1111 1111 1111 1111 1111 1011 1100
补码:1111 1111 1111 1111 1111 1111 1011 1101
b:原码,反码,补码相同:116=64+32+16+4
补码:0000 0000 0000 0000 0000 0000 0111 0100
c:原码,反码,补码相同:78=64+8+4+2
补码:0000 0000 0000 0000 0000 0000 0100 1110a^b&c:
0000 0000 0000 0000 0000 0000 0111 0100
&0000 0000 0000 0000 0000 0000 0100 1110
------------------------------------------
0000 0000 0000 0000 0000 0000 0100 0100
^1111 1111 1111 1111 1111 1111 1011 1101
------------------------------------------
1111 1111 1111 1111 1111 1111 1111 1001把结果的补码变因原码:
反码:1111 1111 1111 1111 1111 1111 1111 1000
原码:1000 0000 0000 0000 0000 0000 0000 0111
所以结果是-7正数的原,反,补相同.
负数的反码是原码除符号位外各位按位取反.负数的补码=反码+1.
for(int j = 0;j < interestRate.length;j++) //... 遍历这个年历数组
interestRate[j] = (STARTRATE + j)/100.0; //... 计算年利率的值,个人觉得这个题目应当会提示,年利率会有公式的,告诉你怎么计算出来?第二个题目:定义一个taskInner()方法,这个方法调用内部类并且为内部类赋值,你定义了内部类,当然就要为它赋值了、
最后的public static void main(String[] args){
A i=new A();
i.taskInner();
,这个是主函数,定义了外部类的类变量A i,然后通过外部类就可以调用之前定义的方法taskInner,而这个方法会打印出你内部类所实现的功能~
pubilc void doSomething(int y){ 这个 y 变量定义的毫无意义啊·
import java.text.*;
import javax.awing.*;
public class Compoundlnterest
{ public static void main(String[] args)
{ final int STARTRATE = 10;
final int NRATES = 6;
final int NYEARS = 10;
double[] interestRate = new double[NRATES];
for(int j = 0;j < interestRate.length;j++)
interestRate[j] = (STARTRATE + j)/100.0;
double[][]balance = new double[NYEARS][NRATES];
for(int j = 0;j < balance[0].length;j++)
for(int i = 1;i < balance.length;i++)
{ for(int j = 0;j < balance[i].length;j++)
{ double oldBalance = balance[i - 1][j];
double interest = oldBlance * interestRate[j];
balance[i][j] = oldBlance + interest;
}
}
NumberFormat formatter = NumberFormat.getPercentInstance();
for(int j = 0;j < interestRate.length;j++)
{System.out.print(" ");
System.out.print(formatter.format(interestRate[j]));
}
System.out.print();
formatter = NumberFormat.getCurrencyInstance();
for(int i = 0;i < balance.length;i++)
{ for(int j = 0;j <balance[i].length;j++)
{ System.out.print(" ");
System.out.print(formatter.format(balance[i][j]));
}
System.out.print();
}
} 解完这题马上结贴....小小积分无所谓,再多都了结