在嵌套for循环中缺少int

The following code:

以下代码:

for (i = 1; i <= 5; i++)
{
    System.out.println();
    for (j = 1; j <= i; j++) {
        System.out.print(" ");
        System.out.print(j);
    }
}
for (i = 1; i <=