Consider the program below. What is the output of the program when it is:

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Exercise 6

Suppose that AYBU is a new programming language that is similar to C, except that AYBU uses dynamic scoping. Consider the program below. What is the output of the program when it is:

 

///////////////////////////////////////////////////////////////////

int i=25;

 

void A(void) {

   printf("A1: %d \n",i);

   i--;

   printf("A2: %d \n",i);

}

 

void C(){

   static int i = 99;

   i--;

   printf("C1: %d\n",i);

}

 

void B(int i) {

  printf("B1: %d\n",i);

  i-=10;

  A();

  printf("B2: %d\n",i);

  C();

  printf("B3: %d\n",i);

}

 

int main(int argc, char** argv) {

   int i=100;

   printf("M1: %d\n",i);

   B(i);

   printf("M2: %d\n",i);

   A();

   printf("M3: %d\n",i);

   C();

   return 0;

}

 

 

(a) Compiled with a normal C compiler?

 

M1: 

 

B1: 

 

A1: 

 

A2: 

 

B2: 

 

C1: 

 

B3: 

 

M2: 

 

A1: 

 

 

A2: 

 

 

M3: 

 

 

C1: 

 

 

 

 

(b) Compiled with the new AYBU compiler?

 

M1: 

 

B1: 

 

A1: 

 

A2: 

 

B2: 

 

C1: 

 

B3: 

 

M2: 

 

A1: 

 

 

A2: 

 

 

M3: 

 

 

C1: 

 

 

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