Java实现多项式乘法代码实例

import java.awt.image.DataBufferByte;import java.text.DecimalFormat;public class duioxiangshicheng { static void poiay(double[] A,int m,double[] B,int n,double[] R,int k){  int i,j;  for(i=0;i<k;i++){  R[i]=0.0;  }  for(i=0;i<m;i++){  for(j=0;j<n;j++){   R[i+j]=A[i]+B[j];  }  } } public static void main(String[] args) { int i; double A[]={-4.0,5.0,2.0,-1.0,3.0,2.0}; double B[]={-3.0,-2.0,1.0,3.0}; double[] R=new double[9]; DecimalFormat df=new DecimalFormat("0.0000000E000"); poiay(A,6,B,4,R,9); System.out.println("多项式A*B的结果各项系数："); for(i=0;i<9;i++){  System.out.println("R("+i+")="+df.format(R[i])); } }}

/*输出多项式A*B的结果各项系数：R(0)=-7.0000000E000R(1)=2.0000000E000R(2)=-1.0000000E000R(3)=-4.0000000E000R(4)=0.0000000E000R(5)=-1.0000000E000R(6)=0.0000000E000R(7)=3.0000000E000R(8)=5.0000000E000*/