[Java知识库]用java程序实现两个整数相乘的过程

用java程序实现两个整数相乘的过程

public class _两数相乘过程 {
    public static void main(String[] args) {
        //定义两个数组存储整数
        int[] arr1 = {4,5,6,7};
        int[] arr2 = {3,4,5,6};
        int[] result = new int[arr1.length+arr2.length];
        for (int i = arr2.length-1;i>=0;i--){
            for (int j = arr1.length-1;j>=0;j--){
                result [i+j] += arr2[i] * arr1[j];
            }
        }
        //进位操作
        for (int i =result.length-2;i>=0;i--){
            int temp = result[i];
            result[i] = temp%10;
            result[i-1] +=temp/10 ;
            if (i-1==0){
                break;
            }
        }
        //输出
        for (int i = 0;i<=result.length-2;i++){
            System.out.print(result[i]);
        }
        //验算
        System.out.println();
        System.out.println(4567*3456);
    }
}