topics
name, scope, binding
control flow

1) name scope 
This language has static scope.  What this program prints? 

def fun1() 
    x = 10 
    def fun2(y) 
        x = 5 
        print(x+y) 
    print(x) 
    fun2(3) 
 
fun1() 

2) Convert the following program into pseudo assembly language.

a = 0
do
  a += 1
while a < 10

3) stack frame and static link
draw stack frame and static link of the execution of this program.
def p1():
 x = 10 
 def p2(a):
 print(x)
 def p3(b):
 p2(b)
 p3(2)
p1()

4) assume the following language is "dynamic" scoping. When run this program, what does it print? ( of course, this program looks like C, and C has static scope. However, assume this program is "dynamic scope").

int x = 10; 
int f() { 
 return x; 
}
int g() { 
 int x = 20; 
 return f(); 
} 
main() { 
 printf(g()); 
}