Lab Description:

This lab consist of building a 32 bits calculator that can perform, addition, subtraction, multiplication, exponentiation and converting decimal to roman numeral. I used if statement and loop to write the program

Code:

program lab2;
#include( "stdlib.hhf");
static
    n:int32;
    n1:int32;
    n2:int32;
begin lab2;
        stdout.put("Press [1]:Addition [2]:Subtraction [3]:Multiplication [4]:Exponentiation [5]:Roman numeral [0]:exit",nl);
	repeat
	stdout.put(nl);
        stdout.put("Do operation number: or press 0 to exit:");
    stdin.get(n);
        mov(n, ecx);
         if(n=1) then            
            stdout.put("enter n1: ");    
            stdin.get(n1);
            if(n1>65536) then
                stdout.put(" overflow",nl);
            endif;
            mov(n1, eax);
            stdout.put("enter n2: ");
            stdin.get(n2);
            if(n2>65536) then
                stdout.put(" overflow ",nl);
            endif;
            mov(n2, ebx);
            add(eax, ebx);
            mov(ebx,n);
            stdout.put("The sum is:" ,n, nl);
        elseif (n=2) then          
            stdout.put("enter n1: ");    
            stdin.get(n1);
            if(n1>65536) then
                stdout.put("overflow ",nl);
            endif;
            mov(n1, ebx);
            stdout.put("enter n2: ");
            stdin.get(n2);
            if(n2>65536) then
                stdout.put("overflow ",nl);
            endif;
            mov(n2,eax);      
            sub(eax,ebx);
            mov(ebx,n);
            stdout.put(nl);
            stdout.put("The difference is:",n, nl);
        elseif (n=3) then                           
            stdout.put("enter n1: ");
	      stdin.get(n1);
	      if(n1>65536) then
                stdout.put("overflow ",nl);
            endif;
	      mov(n1,eax);
              stdout.put("enter n2: ");
		stdin.get(n2);
	     if(n2>65536) then
                stdout.put("overflow ",nl);
            endif;
	      mov(n2,ebx);
            mov(0,eax);
                for(mov(0,ecx); ecx<ebx; inc(ecx)) do 		      add(n1,eax);                     mov(eax,n);                  endfor;              stdout.put(nl);              stdout.put("Product is:",n,nl);         elseif (n=4) then                 stdout.put("enter n1:");                 stdin.get(n1);                 if(n1>65536) then
                stdout.put("overflow ",nl);
            endif;
            mov(n1,eax);           
            stdout.put("enter n2: ");
            stdin.get(n2);
            if(n2>65536) then
                stdout.put("overflow ",nl);
            endif;
            mov(n2,ecx);
                if(ecx=0)then
                    mov(1,eax);
                else
                    while(ecx!=1)do
                    mov(0,ebx);
                        while(eax!=0)do
                            add(n1,ebx);
                            dec(eax);
                        endwhile;
                    mov(ebx,eax);
                    dec(ecx);
                         endwhile;
                endif;
            mov(eax,n);
            stdout.put(" Answer is:",n, nl);
        elseif (n=5) then
    stdout.put("enter n:");
    stdin.get(n);
    mov(n,eax);
    stdout.put("roman is: ");
        if(eax>=100) then
            while(eax>=100) do
                sub(100,eax);
                stdout.put("C");
            endwhile;
        endif;
        if (eax>=90) then
            stdout.put("XC");
            sub(90,eax);
        endif;
        if (eax>=50) then 
            stdout.put("L");
            sub(50,eax);
        endif;
        if (eax>=40) then
            stdout.put("XL");
            sub(40,eax);
        endif;
        if(eax>=10) then
            while(eax>=10) do
                sub(10,eax);
                stdout.put("X");
            endwhile;
        endif;
        if (eax>=9) then
            stdout.put("IX");
            sub(9,eax);
        endif;
        if (eax>=5) then 
            stdout.put("V");
            sub(5,eax);
        endif;
        if (eax>=4) then
            stdout.put("IV");
            sub(4,eax);
        endif;
        if(eax>=1) then 
            while(eax>=1) do
                stdout.put("I");
                sub(1,eax);
            endwhile;
        endif;
endif;
until(n=0);
end lab2;

Screen-Shots: