java语言程序设计第八章第十一题参考答案

为一个2*2的线性方程设计一个名为LinearEquation的类，然后编写一个测试程序测试它：

代码：/*

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*/

/**

*

* @author Administrator

*/

class LinearEquation{

int a,b,c,d,e,f;

LinearEquation(int a,int b,int c,int d,int e,int f){

this.a=a;

this.b=b;

this.c=c;

this.d=d;

this.e=e;

this.f=f;

}

int getA(){

return a;

}

int getB(){

return b;

}

int getC(){

return c;

}

int getD(){

return d;

}

int getE(){

return e;

}

int getF(){

return f;

}

boolean isSolvable(){

return a*d-b*c!=0?true:false;

}

int getX(){

return (e*d-b*f)/(a*d-b*c);

}

int getY(){

return (a*f-e*c)/(a*d-b*c);

}

}

public class XiTi811 {

public static void main(String[] args){

System.out.println("请输入a,b,c,d,e,f的值：");

java.util.Scanner input=new java.util.Scanner(System.in);

System.out.print("a=");

int a=input.nextInt();

System.out.print("b=");

int b=input.nextInt();

System.out.print("c=");

int c=input.nextInt();

System.out.print("d=");

int d=input.nextInt();

System.out.print("e=");

int e=input.nextInt();

System.out.print("f=");

int f=input.nextInt();

LinearEquation l=new LinearEquation(a,b,c,d,e,f);

if(a*d-b*c==0)

System.out.println("此方程无解！");

else

System.out.println("线性方程的解为："+l.getX()+"和"+l.getY());

}

}