Exercise 6a Name _____________ /39

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Following the algorithm for staticly allocated activation records of Chapter 12 notes, fill in and label memory contents for Table 1.

Assume that call-by-reference parameter passing is used throughout and that C++ allocates activation records staticly.
Questions 1, 2, 4, 6, 8, etc. should be answered using addresses or values from Table 1 or Table 2.
Questions 3, 5, 7, 9, etc. should be answered using labels such as TMP, IP, PAR[0], etc.
Note that there may be more questions than necessary.

For Table 2, fill in the value column when program instruction 21 is executed.

#include <iostream.h>
void Assign(int &X, int &Y) {
X = Y;
}
void Sum( int B[], int &n,
int &sum) {
int i;
sum=0;
for( i=0; i<n; i++)
Assign(B[i], i);
for (i=0; i<n; i++ )
sum = sum + B[i];
}
void main(void) {
int A[4];
int N;
int result;
N=4;
Sum(A, N, result);
cout << result;
}

**Table 2.**
Address	Symbol	Value
100	A	0
101		1
102		2
103		3
104	N	4
105	result	6
106	i	?

Table 1

_Address_|____Memory Contents___________
main 654 |                    | IP
AR       |_1.______21_________|
     655 |To Operating System | DL
         |____________________|
     656 | main Registers     | TMP
_________|____________________|_____
Sum  657 |                    | 
AR    A  |_2.______100________|PAR[1] 3. 
     658 |                    | 
      N  |_4.______104________|PAR[2] 5.
     659 |                    | 
  result |_6.______105________|PAR[3] 7.
     660 |                    | 
         |_8._______10________| _IP_  9.
     661 |                    | 
         |_10._____654________| _DL_  11.
     662 |                    | 
_________|_12._Sum registers__| _TMP  13.
AR   663 |                    | 
Assign X |_14. 100,101,102,103|PAR[1] 15.
     664 |                    | 
       Y |_16.____106_________|PAR[2] 17.
     665 |                    | 
         |_18.________________| _IP_  19.
     666 |                    | 
         |_20.____657_________| _DL_  21.
     667 |                    | 
         |_22.________________| _TMP  23.
     668 |                    | 
         |_24.________________| ____  25.
     669 |                    | 
         |_26.________________| ____  27.
     670 |                    | 
         |_28.________________| ____  29.

Exercise 6a Name _______________ __/39

Exercise 6a Name _____________ /39