java復數
❶ java 中實現復數的加減
（1）：具體代碼(附註釋)
復數類：
publicclassComplex{
privatefloatshibu;
privatefloatxubu;
Complex()
{this(0,0);
}
Complex(floatshibu,floatxubu){
this.shibu=shibu;
this.xubu=xubu;
}
publicvoidAdd(Complexp)
{
Complexresult=newComplex();
result.shibu=this.shibu+p.shibu;
result.xubu=this.xubu+p.xubu;
System.out.print("加法結果為:"+result.shibu+"+"+result.xubu+"i");
}
publicvoidSub(Complexp)
{
Complexresult=newComplex();
result.shibu=this.shibu-p.shibu;
result.xubu=this.xubu-p.xubu;
System.out.print("加法結果為:"+result.shibu+"+"+result.xubu+"i");
}
publicvoidMul(Complexp)
{
Complexresult=newComplex();
result.shibu=this.shibu*p.shibu-this.xubu*p.xubu;
result.xubu=this.shibu*p.xubu+p.shibu*this.xubu;
System.out.print("乘法結果為:"+result.shibu+"+"+result.xubu+"i");
}
publicstaticvoidmain(String[]args){
Complexfushu1=newComplex(1,2);
Complexfushu2=newComplex(3,4);
fushu1.Add(fushu2);
fushu1.Sub(fushu2);
fushu1.Mul(fushu2);
}
}
（2）：提供一個例子：
源代碼：
importjava.io.*;
publicclassBook{
doublesb;
doublexb;
Book(doublex,doubley){
this.sb=x;
this.xb=y;
}
Book(){
}
publicstaticvoidmain(Stringargs[]){
System.out.println("請輸入數據：");
doublea=0;
doubleb=0;
doublec=0;
doubled=0;
Strings;
BufferedReaderin=newBufferedReader(newInputStreamReader(System.in));
System.out.println("請輸入第一個復述的實部：");
try{
s=in.readLine();
a=Double.parseDouble(s);
}
catch(IOExceptione)
{System.out.println("拋擲異常");}
System.out.println("請輸入第一個復述的虛部：");
try{
s=in.readLine();
b=Double.parseDouble(s);
}
catch(IOExceptione)
{System.out.println("拋擲異常");}
System.out.println("請輸入第二個復述的實部：");
try{
s=in.readLine();
c=Double.parseDouble(s);
}
catch(IOExceptione)
{System.out.println("拋擲異常");}
System.out.println("請輸入第二個復述的虛部：");
try{
s=in.readLine();
d=Double.parseDouble(s);
}
catch(IOExceptione)
{System.out.println("拋擲異常");}
Bookh;
h=newBook(a,b);
Bookj;
j=newBook(c,d);
System.out.println("您輸入的一個數為：");
toString(h);
System.out.println("您輸入的二個數為：");
toString(j);
Bookk;
k=newBook();
charz='y';
do{
System.out.println("請選擇您要進行的計算：");
System.out.println("1：進行加法運算");
System.out.println("2：進行減法運算");
System.out.println("3：進行修改");
System.out.println("4：進行乘法運算");
System.out.println("5：進行除法運算");
System.out.println("6：查看修改結果");
inti=0;
try{
i=Integer.parseInt(in.readLine());
}
catch(IOExceptione)
{System.out.println("拋擲異常");}
switch(i)
{
case1:
k.sb=jia(h.sb,j.sb);
k.xb=jia(h.xb,j.xb);
System.out.println("計算結果的實部為："+k.sb);
System.out.println("計算結果的虛部為："+k.xb);
toString(k);
break;
case2:
k.sb=jian(h.sb,j.sb);
k.xb=jian(h.xb,j.xb);
System.out.println("計算結果的實部為："+k.sb);
System.out.println("計算結果的虛部為："+k.xb);
toString(k);
break;
case3:
System.out.println("請輸入您要修改哪個實數：");
intl=0;
try{
l=Integer.parseInt(in.readLine());
}
catch(IOExceptione)
{System.out.println("拋擲異常");}
if(l==1)
{
h.xiugais(h);
h.xiugaix(h);
}
else
{
xiugais(j);
xiugaix(j);
}
break;
case4:
doublef=0;
doublee=0;
f=cheng(h.sb,j.sb)+cheng(h.xb,j.xb);
e=cheng(h.sb,j.xb)+cheng(h.xb,j.sb);
k.sb=(double)(Math.round(f*100)/100.0);
k.xb=(double)(Math.round(e*100)/100.0);
System.out.println("計算結果的實部為："+k.sb);
System.out.println("計算結果的虛部為："+k.xb);
toString(k);
break;
case5:
doublechushu=cheng(j.sb,j.sb)-cheng(j.xb,-j.xb);
doublebeichushus=jian(cheng(h.sb,j.sb),cheng(h.xb,-j.xb));
doublebeichushux=jia(cheng(h.sb,-j.xb),cheng(h.xb,j.sb));
k.sb=chu(beichushus,chushu);
k.xb=chu(beichushux,chushu);
System.out.println("計算結果的實部為："+k.sb);
System.out.println("計算結果的虛部為："+k.xb);
toString(k);
break;
case6:
System.out.println("修改後的結果為：");
System.out.println("第一個復數："+toString(h));
System.out.println("第二個復數："+toString(j));
break;
}
System.out.println("請問您是否還要繼續y/n：");
try{
z=(char)System.in.read();
System.in.skip(2);//忽略回車換行
}
catch(IOExceptione){}
}while(z=='y');
}
publicstaticdoublegets(Booka){
returna.sb;
}
publicstaticdoublegetx(Bookb){
returnb.xb;
}
publicstaticdoublexiugais(Booka)
{
BufferedReaderin=newBufferedReader(newInputStreamReader(System.in));
System.out.println("請輸入您要修改的實部：");
doublem=0;
try{
m=Double.parseDouble(in.readLine());
}
catch(IOExceptione)
{System.out.println("拋擲異常");}
a.sb=m;
System.out.println("修改成功：");
return0;
}
publicstaticdoublexiugaix(Bookb)
{
BufferedReaderin=newBufferedReader(newInputStreamReader(System.in));
System.out.println("請輸入您要修改的虛部：");
doublen=0;
try{
n=Double.parseDouble(in.readLine());
}
catch(IOExceptione)
{System.out.println("拋擲異常");}
b.xb=n;
System.out.println("修改成功：");
return0;
}
publicstaticdoublejia(doublea,doubleb)//
{
doublec=0;
c=a+b;
System.out.println("加法成功：");
returnc;
}
publicstaticdoublejian(doublea,doubleb)
{
doublec=0;
c=a-b;
System.out.println("減法成功：");
returnc;
}
publicstaticdoublecheng(doublea,doubleb)
{
doublec=0;
c=a*b;
System.out.println("乘法成功：");
returnc;
}
publicstaticdoublechu(doublea,doubleb)
{
doubled=0;
doublec=0;
d=a/b;
c=(double)(Math.round(d*100)/100.0);
System.out.println("除法成功：");
returnc;
}
publicstaticdoubletoString(Booka){
System.out.println("結果為："+a.sb+"+"+a.xb+"*i");
return0;
}
}
（3）測試結果截圖：
❷ 用Java語言定義復數類Complex，必須滿足如下要求：
public class Complex{
public int RealPart;
public int ImaginPart;
public Complex(){
this.RealPart = 0;
this.ImaginPart = 0;
}
public Complex(int r, int i){
this.RealPart = r;
this.ImaginPart = i
}
public Complex complexAdd(Complex a){
this.RealPart += a.RealPart;
this.ImaginPart += a.ImaginPart;
//這里返回什麼？復數值是指哪個？還是復數對象？沒有說清楚。我這里返回復數對象。
return this;
}
public String ToString(){
return ""+this.RealPart + this.ImaginPart;//return "" + 1 + 2 = "12";不知道這里要求是不是這樣。有些話寫的我沒法理解。你的a + bi是個啥？如果是返回實數和虛數的和就給 1 + 2的部分加上括弧。
}
}
❸ java:創建復數類並實現復數的基本運算
package main;
public class Complex {
private int a;
private int b;
public Complex() {
this.a = 0;
this.b = 0;
}
public Complex(int a, int b) {
this.a = a;
this.b = b;
}
public int getA() {
return a;
}
public void setA(int a) {
this.a = a;
}
public int getB() {
return b;
}
public void setB(int b) {
this.b = b;
}
@Override
public String toString() {
return "(" + a + "+" + b + "i)";
}
}
package main;
public class ComplexTest {
public static Complex add(Complex c1, Complex c2) {
return new Complex(c1.getA() + c2.getA(), c1.getB() + c2.getB());
}
public static Complex subtract(Complex c1, Complex c2) {
return new Complex(c1.getA() - c2.getA(), c1.getB() - c2.getB());
}
public static Complex multiply(Complex c1, Complex c2) {
return new Complex(c1.getA() * c2.getA() - c1.getB() * c2.getB(),
c1.getB() * c1.getA() + c1.getA() * c2.getB());
}
public static Complex division(Complex c1, Complex c2) {
int a = c1.getA();
int b = c1.getB();
int c = c2.getA();
int d = c2.getB();
return new Complex((a *c + b * d) / (c * c + d * d), (b * c - a * d) / (c * c + d * d));
}
public static void main(String []args) {
Complex c1 = new Complex(1, 2);
Complex c2 = new Complex();
System.out.println(c1);
System.out.println(c2);
System.out.println(add(c1, c2));
}
}