Java的應該是這樣∼∼

class Sum20
{
public static void main(String[] args)
{
int sum = 0;
for (int i = 1; i <= 20 ; i++ )
{
sum = sum + i;
}
System.out.println(sum);
}
}
//--------------------------------------------------
class Sum100
{
public static void main(String[] args)
{
int sum = 0;
for (int i = 1; i <= 100 ; i++ )
{
sum = sum + i;
}
System.out.println(sum);
}
}