设计函数求一元多项式的导数。(注:xn(n为整数)的一阶导数为n*xn-1。)
输入格式:以指数递降方式输入多项式非零项系数和指数(绝对值均为不超过1000的整数)。数字间以空格分隔。
输出格式:以与输入相同的格式输出导数多项式非零项的系数和指数。数字间以空格分隔,但结尾不能有多余空格。注意“零多项式”的指数和系数都是0,但是表示为“0 0”。
输入样例: 3 4 -5 2 6 1 -2 0 输出样例: 12 3 -10 1 6 0
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
// TODO Auto-generated method stub
Scanner in = new Scanner(System.in);
int count = 0 ;
int[] zhishu = new int[1000];
int[] xishu = new int[1000];
int[] daoshu = new int[1000];
int a = in.nextInt();
int b = in.nextInt();
xishu[count] = a;
zhishu[count] = b;
daoshu[count] = xishu[count] * zhishu[count];
zhishu[count]--;
if ( zhishu[count] == -1 ){
System.out.print(daoshu[count]+" "+(zhishu[count]+1));
}
else{
System.out.print(daoshu[count]+" "+zhishu[count]);
count++;
while( b != 0 ){
a = in.nextInt();
b = in.nextInt();
xishu[count] = a;
zhishu[count] = b;
daoshu[count] = xishu[count] * zhishu[count];
zhishu[count]--;
if ( zhishu[count] != -1){
System.out.print(" "+daoshu[count]+" "+zhishu[count]);
}
count++;
}
}
in.close();
}
}