面试题66：给定一个数组A[0,1,...,n-1],请构建一个数组B[0,1,...,n-1], * 其中B中的元素B[i]=A[0]*A[1]*...*A[i-1]*A[i+1]*...*A[n...

 

 

package siweifasan_6_5;

import org.omg.CORBA.INTERNAL;

/**
 * @Description:给定一个数组A[0,1,...,n-1],请构建一个数组B[0,1,...,n-1],
 * 其中B中的元素B[i]=A[0]*A[1]*...*A[i-1]*A[i+1]*...*A[n-1]。不能使用除法。
 * @Author: Allen
 * @Return:
 */
public class Main03 {
    public static void main(String[] args) {
        int[] A = {1,2,3,4,5};
        
        Solution03 slt = new Solution03();
        int[] B = slt.multiply(A);
        for(int i=0; i<B.length; i++){
            System.out.print(B[i]+" ");
        }
    }
}

class Solution03 {
    public int[] multiply(int[] A) {
        int[] B = new int[A.length];
        B[0]=1;
        for(int i=1; i < B.length; i++){
            B[i]=B[i-1]*A[i-1];
        }
        int temp=1;
        for(int j=A.length-2; j>=0; j--){
            temp *= A[j+1];
            B[j] *= temp;
        }
        return B;
    }
}

 

转载于:https://www.cnblogs.com/Allen-win/p/7821177.html