用JAVA实现复数的四则运算 import java.io.*; public class Book

文件名称: 用JAVA实现复数的四则运算

所属分类: C

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文件大小: 1kb

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上传时间: 2010-04-28

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详细说明： import java.io.*; public class Book{ double sb; double xb; Book(double x,double y){ this.sb=x; this.xb=y; } Book(){ } public static void main(String args[]){ System.out.println("请输入数据："); double a=0; double b=0; double c=0; double d=0; String s; BufferedReader in = new BufferedReader(new InputStreamReader(System.in)); System.out.println("请输入第一个复数的实部："); try{ s = in.readLine(); a=Double.parseDouble(s); } catch(IOException e) { System.out.println(&quo t;抛掷异常");} System.out.println("请输入第一个复述的虚部："); try{ s = in.readLine(); b =Double.parseDouble(s); } catch(IOException e) { System.out.println("抛掷异常");} System.out.println("请输入第二个复述的实部："); try{ s = in.readLine(); c =Double.parseDouble(s); } catch(IOException e) { System.out.println("抛掷异常");} System.out.println("请输入第二个复述的虚部："); try{ s = in.readLine(); d =Double.parseDouble(s); } catch(IOException e) { System.out.println("抛掷异常");} Book h; h=new Book(a,b); Book j; j=new Book(c,d); System.out.println("您输入的一个数为："); toString(h); System.out.println("您输入的二个数为："); toString(j); Book k; k=new Book(); char z='y'; do{ System.out.println("请选择您要进行的计算："); System.out.println("1 ：进行加法运算"); System.out.println("2 ：进行减法运算"); System.out.println("3 ：进行修改"); System.out.println("4 ：进行乘法运算"); System.out.println("5 ：进行除法运算"); System.out.println("6 ：查看修改结果"); int i=0; try{ i= Integer.parseInt(in.readLine()); } catch(IOException e) { System.out.println("抛掷异常");} switch(i) { case 1: k.sb=jia(h.sb,j.sb); k.xb=jia(h.xb,j.xb); System.out.println("计算结果的实部为："+k.sb); System.out.println("计算结果的虚部为："+k.xb); toString(k); break ; case 2: k.sb=jian(h.sb,j.sb); k.xb=jian(h.xb,j.xb); System.out.println("计算结果的实部为："+k.sb); System.out.println("计算结果的虚部为："+k.xb); toString(k); break ; case 3: System.out.println("请输入您要修改哪个实数："); int l=0; try{ l= Integer.parseInt(in.readLine()); } catch(IOException e) { System.out.println("抛掷异常");} if(l==1) { h.xiugais(h); h.xiugaix(h); } else { xiugais(j); xiugaix(j); } break ; case 4: double f=0; double e=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("计算结果的实部为："+k.sb); System.out.println("计算结果的虚部为："+k.xb); toString(k); break ; case 5: double chushu=cheng(j.sb,j.sb)-cheng(j.xb,-j.xb); double beichushus=jian(cheng(h.sb,j.sb),cheng(h.xb,-j.xb)); double beichushux=jia(cheng(h.sb,-j.xb),cheng(h.xb,j.sb)); k.sb=chu(beichushus,chushu); k.xb=chu(beichushux,chushu); System.out.println("计算结果的实部为："+k.sb); System.out.println("计算结果的虚部为："+k.xb); toString(k); break ; case 6: System.out.println("修改后的结果为："); System.out.println("第一个复数："+toString(h)); System.out.println("第二个复数："+toString(j)); break ; } System.out.println("请问您是否还要继续 y/n："); try{ z=(char)System.in.read(); System.in.skip(2); //忽略回车换行 } catch(IOException e){} } while(z=='y'); } public static double gets(Book a){ return a.sb; } public static double getx(Book b){ return b.xb; } public static double xiugais(Book a) { BufferedReader in = new BufferedReader(new InputStreamReader(System.in)); System.out.println("请输入您要修改的实部："); double m=0; try{ m= Double.parseDouble(in.readLine()); } catch(IOException e) { System.out.println("抛掷异常");} a.sb=m; System.out.println("修改成功："); return 0; } public static double xiugaix(Book b) { BufferedReader in = new BufferedReader(new InputStreamReader(System.in)); System.out.println("请输入您要修改的虚部："); double n=0; try{ n= Double.parseDouble(in.readLine()); } catch(IOException e) { System.out.println("抛掷异常");} b.xb=n; System.out.println("修改成功："); return 0; } public static double jia(double a,double b)// { double c=0; c=a+b; System.out.println("加法成功："); return c ; } public static double jian(double a,double b) { double c=0; c=a-b; System.out.println("减法成功："); return c; } public static double cheng(double a,double b) { double c=0; c=a*b; System.out.println("乘法成功："); return c; } public static double chu(double a,double b) { double d=0; double c=0; d=a/b; c=(double)(Math.round(d*100)/100.0); System.out.println("除法成功："); return c ; } public static double toString(Book a){ System.out.println("结果为："+a.sb+"+"+a.xb+"*i"); return 0; } } ...展开收缩

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