Answered: Write an assembly language program that…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Write an assembly language program that reads from the keyboard a positive integer N (N > 0)
and finds and displays on the screen all the divisors of N and all the multiples of N up to 20N.
Your program must satisfy the following:
 Allow the user to do any number of runs entering a new value for N each time.
 Define and use the following 4 procedures:
 ReadN: asks the user to enter a positive integer N (N > 0) and reads it. If the user enters
an invalid value, it displays the error message “Invalid. It must be positive. Try again.”,
and reads again until a valid value is entered. It returns the entered valid value in EAX.
 FindDivisors: finds and displays all the divisors of N. You must optimize the loop to
run as efficiently as possible. The value of N is passed to the procedure in EAX.
 FindMultiples: calculates and displays on the screen all the multiples of N up to 20N.
The value of N is passed to the procedure in EAX.
 AnotherRun: asks the user “Do you want another run? (Y/N): ”. If the user enters ‘Y’
or ‘y’, it returns 1 in the AL register otherwise it returns 0 in the AL register.
 The sample run on the next page shows how your program should run

CN. C:\WINDOWS\system32\cmd.exe
Enter an integer N (N> 0): -1
Invalid. It must be positive. Try again.
Enter an integer N (N > 0): 78
The divisors of 78 are:
1 2 3 6 13 26 39 78
The multiples of 78 are:
78 156 234 312 390 468 546 624 702 780 858 936 1014 1092 1170 1248 1326 1404 1482 1560
Do you want another run? (Y/N): y
Enter an integer N (N> 0): 91
The divisors of 91 are:
1 7 13 91
The multiples of 91 are:
91 182 273 364 455 546 637 728 819 910 1001 1892 1183 1274 1365 1456 1547 1638 1729 1820
Do you want another run? (Y/N): y
Enter an integer N (N> 0): 154
The divisors of 154 are:
0
1 2 7 11 14 22 77 154
The multiples of 154 are:
154 308 462 616 770 924 1078 1232 1386 1540 1694 1848 2002 2156 2310 2464 2618 2772 2926 3080
Do you want another run? (Y/N): y
Enter an integer N (N > 0): 240
The divisors of 240 are:
1 2 3 4 5 6 8 10 12 15 16 20 24 30 40 48 60 80 120 240
The multiples of 240 are:
240 480 720 960 1200 1440 1680 1920 2160 2400 2640 2880 3120 3360 3600 3840 4080 4320 4560 4800
Do you want another run? (Y/N): n
Press any key to continue...

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