java - 帮助java矩阵？

Question

我需要帮助，我遇到了这个矩阵的问题，我需要以这种方式得到它:

1 2  3  4 = 102 4  6  8 = 203 6  9 12 = 304 8 12 16 = 40

But I have it in this way:

1 2 3 4 12 4 6 8 23 6 9 12 34 8 12 16 4

I dont know how can we do that, I intent but nothing

This is my code:

public class Matrix {

    public static void main(String args[]) {

        int mult = 4;


        for (int i = 1; i <= mult; i++) {
           // System.out.println();


            for (int j = 1; j <= mult; j++) {
                int operacion = i * j;
                int suma = 0;
                suma = operacion + suma;

                System.out.print(operacion + " ");

            }


            int sum = 0;
            sum = i + sum;
            System.out.println(sum);


        }
    }
}

再见

Answer 1

当你这样做时:

for (int j = 1; j <= mult; j++) {
    int operacion = i * j;
    int suma = 0;
    suma = operacion + suma;

suma 始终等于 operacion，因为您每次都将其设置为 0，然后添加 operacion。

您想要执行此操作:

int suma = 0;
for (int j = 1; j <= mult; j++) {
    int operacion = i * j;
    suma += operacion;