Convert Simple C++ Program in Pep9 Assembly Assignment Solution.

Instructions

Objective

Write a program to convert a simple C++ program in Pep9 assembly.

Requirements and Specifications

Take the following C++ program and translate it into PEP/9 assembly language.

#include <iostream>
using namespace std;
int num;
char letter;
int main() {
   cin >> num;
   cin >> letter;
   cout << "You inputted " << num << endl;
   cout << "Option " << letter << endl;
   if (letter == '*')
      cout << "Multiplied by 2 " << num*2 << endl;
   return 0;
}

Screenshots of output

Convert simple C++ program in Pep9 assembly

Source Code

; int main()
temp: .EQUATE 0 ; temporary variable #2d
main: DECI num,d ; cin >> num;
         LDBA charIn,d ; cin >> letter
         STBA letter,d
         STRO msg1,d ; cout << "You inputted " << num << endl;
         DECO num,d
         LDBA '\n',i
         STBA charOut,d
         STRO msg2,d ; cout << "Option " << letter << endl;
         LDBA letter,d
         STBA charOut,d
         LDBA '\n',i
         STBA charOut,d
         LDBA letter,d
if: CPBA '*',i ; if (letter == '*')
         BRNE endif
         LDWA num,d ; //calculate num+num to get 2*num
         ADDA num,d
         SUBSP 2,i ; //push #temp
         STWA temp,s
         STRO msg3,d ; cout << "Multiplied by 2 " << num*2 << endl;
         DECO temp,s
         ADDSP 2,i ; //pop #temp
         LDBA '\n',i
         STBA charOut,d
endif: STOP ; return 0;
num: .WORD 0 ; int num
letter: .BYTE 0 ; char letter
msg1: .ASCII "You inputted \x00"
msg2: .ASCII "Option \x00"
msg3: .ASCII "Multiplied by 2 \x00"
         .END