Convert decimal to binary/octal/hexadecima value and vice versa

I'm trying to write a program that will convert a decimal number that a user inputs to a binary, octal and hexadecimal value. As well as convert a binary, octal and/or hexadecimal that user inputs to a decimal number. I can not use the functions matlab has to do this conversion. I have to create my own algorithms.I am not skilled in matlab so I do not know how to start or what to do.

Can someone help me

[Walter Roberson]

Okay so go ahead and create your own algorithms . Once you have decided on algorithms then start programming in MATLAB. If you run into problems you can post your commented code (that describes your algorithms ) and the error message and we will help you understand the error message. (We might or might not tell you whether your algorithms are correct , depends on our mood. So think about the algorithm .)

Answer 1

[TyTy]

I don't know where to start

[Walter Roberson]

Start by researching what binary and octal and hexadecimal number systems mean . Watch some YouTube on how to convert to binary .

[Walter Roberson]

This is stuff I learned in grade 5 over 40 years ago. We are not going to hand you the solution . We are going to make you do your own research as to what the question means and how number systems work . Our role is to help you understand what MATLAB is telling you not to solve the assignment for you.

[TyTy]

I know how to do the conversions by hand but I do not know how to input them into matlab without using the functions. I watched youtube videos and searched other answers posted on matlab. If you think you know it all show me an example of one of the 8 conversion I need. Belittling me is not helping.

[Walter Roberson]

How would you convert 13 decimal to binary by hand? How would you convert A5 hex to decimal ?

If you know how to do base conversion by hand then you have a place to start: write down the algorithm and then start converting to MATLAB statements .

Answer 2

[TyTy]

clear all
fprintf (['Hello, What value would you like to convert?\n Type ''1'' for Binary to Decimal OR ''2'' for Hexadecimal to decimal OR''3'' for Octal to decimal OR Type ''4'' for Decimal to Binary OR 5 for Decimal to Hexadecimal OR 6 for Decimal to Octal']);
Value = input('')
if Value = 1
    fprintf('What is the value?') 
end

this is all i have

[Walter Roberson]

MATLAB uses == for comparisons.

use input() with the 's' option to prompt and accept a value in the form of a character vector .

You might be tempted to accept values as numeric but that will fail for hex because of the A to F characters and will fail for more than 15 binary digits as you start to overflow representation . Process characters on input instead .

Really you only need two routines: one to convert aa character vector in an arbitrary base into numeric form and the other to convert numeric form to arbitrary base . There is no need for distinct routines to handle those bass. With just those two routines you could easily convert base 9 to base 19 for example .

[TyTy]

How can I loop the code and for my last case, case 5. I can't get the octal to decimal conversion to work

fprintf(['Choose what conversion you would like performed:\n Type 1 for Decimal to' +...
' Binary and Octal\n Type 2 for Decimal to Hexadecimal \n Type 3 for Hexcidecimal to ' +...
'Decimal\n Type 4 for Binary to Decimal\n Type 5 for Octal to Decimal\n']);
choice = input('What is your response:\n ');
if choice ~= 3
   if choice ~= 5 
decimal = input('What value do you want to convert?\n ');
  decimal = num2str(decimal);
  lengthtotal = strlength(decimal);
  location = strfind(decimal,'.');
  n=16;
   end 
end
        switch choice 
            case  1
                
                fprintf(['Enter the base of the value type' +...
                    'convert into 2 for binary, or 8 for octal then press Enter\n']);
                base = input('Enter Here ');
              
                          
                if location >0            
                        
                        decimalIL = decimal(1:location);
                        lengthtotalInteger = strlength(decimalIL);
                        decimalI = str2double(decimalIL);
                        base = double(base);
                        s(:,n) = rem(decimalI,base);
                        
                        while any(decimalI) && n >1 
                            n = n - 1;
                            decimalI = floor(decimalI/base);
                            s(:,n) = rem(decimalI,base);
                        end
                        

                        c1=1;
                        decimalb = decimal(location:lengthtotal);
                        lengthtotalDL = strlength(decimalb);
                        decimalb = str2num(decimalb);

                        while any(decimalb) && c1 <= lengthtotalDL
                           decimalb = decimalb*base;
                            if decimalb>=1
                                s1(:,c1) =1;
                                decimalb = decimalb-1;
                            else
                                s1(:,c1) =0;
                            end
                            c1 = c1+1;
                        end
                        symbols = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ';
                        p=size(s);
                        p1=size(s1);
                        result = reshape(symbols(s+1),size(s));
                        result1 = reshape(symbols(s1 + 1),size(s1));
                        fprintf('The Answer  = %s.%s\n\n\n',result,result1);
                                   
                else 
%                     
                        decimal = str2double(decimal);
                        base = double(base);
                        s(:,n) = rem(decimal,base);
                        while any(decimal) && n >1
                            n = n - 1;
                            decimal = floor(decimal/base);
                            s(:,n) = rem(decimal,base);
                        end
                        symbols = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ';
                        p=size(s);
                        result = reshape(symbols(s + 1),size(s));
                   
                        fprintf('The conversion result is = %s\n',result);
                      
                end 
     
                
                
                
                
            case  2
                          base = 16;

         if location >0            
                        
                        decimalIL = decimal(1:location - 1);
                        lengthtotalInteger = strlength(decimalIL);
                        decimalI = str2double(decimalIL);
                        s(:,n) = rem(decimalI,base);
                        while any(decimalI) && n >1 
                            n = n - 1;
                            decimalI = floor(decimalI/base);
                            s(:,n) = rem(decimalI,base);
                        end


                        c1=1;
                        c2=1;
                        decimalfrac = decimal(location:lengthtotal);
                        lengthtotalfrac = strlength(decimalfrac);
                        decimalfrac = str2num(decimalfrac);

                        while any(decimalfrac) ~= 0 && c1 ~=8
                        
                            if decimalfrac>=1
                                 remainder1 = rem(decimalfrac,2);
                                if remainder1 == 0
                                    decimalbI= decimalfrac;
                                    s1(:,c1) =decimalbI;
                                else
                                    decimalfrac = num2str(decimalfrac);
                                    lengthtotal = strlength(decimalfrac);
                                    location = strfind(decimalfrac,'.');
                                    decimalbI = decimalfrac(1:location);
                                    decimalbI = str2double(decimalbI);
                                    decimalfrac = decimalfrac(location:lengthtotal);
                                    decimalfrac = str2num(decimalfrac);
                                    decimalfrac = decimalfrac*base;
                                    decimalfrac = num2str(decimalfrac);
                                    lengthtotalDL = strlength(decimalfrac);
                                    decimalfrac = str2num(decimalfrac);
                                    s1(:,c2) =decimalbI;
                                    c2= c2+1;
                               end
                            else
                                decimalfrac = decimalfrac*base;
                            end
                            c1 = c1+1;
                        end
                        symbols = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ';
                        p=size(s);
                        p1=size(s1);
                        result = reshape(symbols(s + 1),size(s));
                        result1 = reshape(symbols(s1 + 1),size(s1));
                        fprintf('The Conversion Result = %s.%s\n\n\n',result,result1);
                        conversion();
         else
                    
                       decimal = str2num(decimal);
                       s(:,n) = rem(decimal,base);

                        while any(decimal) && n >1
                            n = n - 1;
                            decimal = floor(decimal/base);
                            s(:,n) = rem(decimal,base);
                        end
                        symbols = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ';
                        p=size(s);
                        result = reshape(symbols(s + 1),size(s));
                        %                     result
                        fprintf('The Conversion Result = %s\n',result);
          end 
                
            case 3
               
                decimal = input(['What is the hexadecimal',...
                'number you would like to convert. Example ''A''\n ']);
                hex = decimal;
                hex = upper(hex);
                [m,n]=size(hex);
                sixteen = 16;
                p = fliplr(cumprod([1 sixteen(ones(1,n-1))]));
                p = p(ones(m,1),:);

                dec = hex <= 64; 
                hex(dec) = hex(dec) - 48;

                dec =  hex > 64; 
                hex(dec) = hex(dec) - 55;

                result = sum(hex.*p,2);
                
                
                
            case 4
            
            [m,n] = size(decimal);

            
            v = decimal - '0';

            twos = pow2(n-1:-1:0);

            result = sum(v .* twos(ones(m,1),:),2);
            
            
            
            case 5
               
            decimal = input(['What is the value you want to convert from',...
            ' Octal to Decimal. Example ''111''\n ']);
            octal = int2str(decimal);
            d = 0;
            f = fliplr(octal);
            for power = 0 : length(octal) - 1
                result = result + str2num(f(power+1)) * 8^power;

            end
            
           

        end