17 replies to this topic

[DeeZeL]

ok, I have to make this program that uses nested loops to produce the following output:

2 4 6 8 10
3 6 9 12 15
4 8 12 16 20
5 10 15 20 25

Seems simple huh?. Heres the sorce code showing the logic I followed (I didnt do any nested loops btw):

#include <iostream> 
#include <iomanip> 
using namespace std; 
void main() 
{ 
   int a,b,c,d; 
   for (a=1; a < 11; a++) 
   { 
      a=a+1; 
      cout<<setw(2)<<a<<setw(4); 
   } 
   cout<<endl; 
   for (b=1; b < 16; b++) 
   { 
      b=b+2; 
      cout<<setw(2)<<b<<setw(4); 
   } 
   cout<<endl; 
   for (c=1; c < 21; c++) 
   { 
      c=c+3; 
      cout<<setw(2)<<c<<setw(4); 
   } 
   cout<<endl; 
   for (d=1; d < 26; d++) 
   { 
      d=d+4; 
      cout<<setw(2)<<d<<setw(4); 
   } 
   cout<<endl; 
}

now, here the output:

2 4 6 810
3 6 91215
4 8121620
510152025
Press any key to continue

Notice how there is no space between 2-digit numbers. What could cause this? help would be really appreciated.

[Detail]

Thats the power of Array ;)2
You need to put a space in.

[Mastermind]

for ( i=2; i<6; i++)
{
     for (j=1; j<6; j++)
     {
          cout<<i*j;
          cout<<" ";
     }
     cout<<endl;
}

There's nested loops that should do exactly what you need. Just declare the variables before it, and you're done.

[DeeZeL]

Yeah, sorry for not replying here for a long time but I sorted it out, thanks for the help anyways

[Nicolas]

Help me out, I justed got a new compilter in Dev version 5.0, but it don't has a apstring class, so I can't uses it. Can you show me how to include apstring to my compiler, if you can, show me where I can get apstring codes

Also I have another problem, my teacher just come up with new program : Convert a binary number to decimal, I just learned C++, most of the basics stuff like loops and etc.... I know it suppose to use an array to convert, but I haven't learn an array yet! I know there is a way to convert without using array, just a plain <iostream.h> header filer, without anything more. I know there are a ways because my friends they done there program with a regullar variable, nothing special to it. I can't figure out how they did it.

[the_kid]

<offtopic=sorta>In the future you may want to start a new thread for new questions</offtopic>

[Nicolas]

Help me out, I justed got a new compilter in Dev version 5.0, but it don't has a apstring class, so I can't uses it. Can you show me how to include apstring to my compiler, if you can, show me where I can get apstring codes

Also I have another problem, my teacher just come up with new program :  Convert a binary number to decimal,  I just learned C++, most of the basics stuff like loops and etc.... I know it suppose to use an array to convert, but I haven't learn an array yet!  I know there is a way to convert without using array, just a plain <iostream.h> header filer, without anything more.  I know there are a ways because my friends they done there program with a regullar variable, nothing special to it.  I can't figure out how they did it.

I know it sorta out of topic, but I really need help so I thought......continues

[Detail]

Have you asked at the Dev forums. As thay made it, thay would be the best people to help you.

[Nicolas]

Well, I have figure out the program, it tooks me heck of a time to finish that program without our using the power of array, thank you for helping me out.

I still have trouble on how to add an apstring to the dev compiler

[TGMTE]

Using string comparision for this seems like a waste of time.

To convert binary into decimal is very simple and can be done as shown below:

Say we want to convert the 8 bit value 10011101 into a decimal value, we can use a formula like that below:

128 64 32 16 8 4 2 1
1 0 0 1 1 1 0 1

As you can see we have placed the numbers 1, 2, 4, 8, 16, 32, 64, 128 (powers of two) in reverse numerical order and then written the binary value below, to convert you simply take a value from the top row wherever there is a 1 below and add the values together, for instance in our example we would have 128 + 16 + 8 + 4 + 1 = 157. For a 16 bit value you would use the decimal values 1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 2048, 4096, 8192, 16384, 32768 (powers of two) for the conversion.

Because we know binary is base 2 then the above could be written as:

1*27 + 0*26 + 0*25 + 1*24 + 1*23 + 1*22 + 0*21 + 1*20 = 157.

[Nicolas]

Thanks for solving, but it were just a starter of program process, it took me quite few hours, and hint from a friend for me able to figure it out. I use modulus and value 127, you can only enter 7 digits, so it's 128 / value, that value is assign to 128. It time it go by using loop, that value divide by half, I did mention I was using modulus: (128 / value) * modulus, well the rest of the program you can figure out, it like 4 or 5 lines to the program. My friend the one that gives me the hint, he did like 3 line to convert.

We got like 7 program to figure out include the binary above, I only know how to solve 5 program, the last 2 is extreme diffifult...

[TGMTE]

Care to post them?

[Nicolas]

The last two is this:

Converts standard Arabic numbers to Roman numerals. Maximum 3000.

Extend the program to convert from Roman numerals to standard Arabic Numbers.

[TGMTE]

Sorry, forgot to log in again.

[Nicolas]

Hey , all you kidding, that is awsome. Well, I can't use your coding to turn in anyway, I like to figure out by myself, that what program interesting right, it a challenge that you want to catch.

Can you extend the program and made it a reverse.

Well that program is to complex man, We haven't even study function and arry yet, but I like to study by myself ahead and basic understanding. Even thought , I got C++ book at home.

Here is a program that I made guess a number between 1 and 100, user thinks of a number and I would able to guess that number by asking high or low, and just keep asking the user.

Here is what I make:

Attached Files

•  IItest.cpp   999bytes   7 downloads

[Nicolas]

Hey, that awsome, but I can't coppy the code and turn in, there were no challenge in that, that what program is, it the challenge that we are seeking right.

Thanks, I can use your program to study and hopful I can figure it out. I haven't study function and arry yet, but I like to study by my own and I guess I can figure our your program, hopfully <_< .

Well, here is another program that I make that ask the user thinks of a number and the program will guess what that number is. The number between 1 and 100.
1st guess should be 50, then ask is it higher or lower....if it was wrong.

Here the code:

[code=auto:0]

Attached Files

•  IItest.cpp   999bytes   2 downloads

[Nicolas]

Oops, sorry that I post it 2 time in a day, I thought I lost the first post, but again I didn't see there is a second page. :(