by Kevin Kononenko 凯文科诺年科(Kevin Kononenko) JavaScript变量作用域如何像多个级别的政府一样 (How JavaScript variable scoping is just like multiple levels of government) Have you ever smashed your keyboard in frustration after getting an undefined value
/**这是说明变量作用域的示例程序* 程序的名字为 VarExample.java*/
public class VarExample{static int a1=10; //类变量,对整个类都有效
public static void display()
{int a2=200; //方法变量,只在该方法内有效a1=a1+a2;System.out.print
首先,代码如下: #include <stdio.h>
int m = 5;
int main()
{int a = 2;a = fun(a);printf("a=%d", a + m);
}
fun(int x) {int m = 3;m = m + x;return m;
} 解析:该程序中,命名了一个与与主函数