class Demo
{
public static void main(String[] args)
{
int a = 10;
int b = 20;
System.out.println("a:"+a+",b:"+b);a=10,b=20
change(a,b); a=20,b=40
System.out.println("a:"+a+",b:"+b);
int[] arr = {1,2,3,4,5};
change(arr);
System.out.println(arr[1]);8
}
public static void change(int a,int b)
{
System.out.println("a:"+a+",b:"+b);
a = b;
b = a + b;
System.out.println("a:"+a+",b:"+b);a=b;b=2b
}
public static void change(int[] arr)
{
for(int x=0; x<arr.length; x++)
{
if(arr[x]%2==0)
{
arr[x]*=2;
}
}
}
}
看视频不懂……
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