1) Consider the following program. What output is produced if static scoping is

Question

1) Consider the following program. What output is produced if static scoping is used? What output is produced if dynamic scoping is used? (4pts)

int a, b;
void p() {
     int a, p;
     a = 0;
     b = 1;
     p = 2;
     return p;
}
void print() {
     printf("%d %d ", a, b);
}
void q() {
     int b;
     a = 3;
     b = 4;
     print();
}
int main() {
     a = p();
     q();
     return 0;
}

Answer:

2) Consider the following program. What output is produced if static scoping is used? What output is produced if dynamic scoping is used? (4pts)

int a, b, c;
void print() {
     printf("%d %d %d ", a, b, c);
}
void q() {
     int b;
     a = 5;
     b = 4;
     print();
}
void p() {
    int a;
     a = 0;
     b = 1;
     c = a + b;
     q();
}
int main() {
     p();
     return 0;
}

Answer:

3) Consider the following program. What output is produced if static scoping is used? (4pts)

procedure P0
     var x: integer;

     procedure P1(x: integer)
          begin
               x := x + 1;
              P2
          end
     procedure P2
          begin
               x := x * 2;
          end
     begin
          x := 1;
         P1(x);
         print x
     end

Answer:

Explanation / Answer

1. If dynamic scoping is used then output is: 3 1

If static scoping is used then output is: 3 1

2.

If dynamic scoping is used then output is: 5 1 1

If static scoping is used then output is: 5 1 1

3.

If static scoping is used then output is: 2

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