Thread: Outputting to a table

Hi there guys. I'm trying to output the contents of a single subscripted array with the size 100 but I am seriously struggling.

I need the table to look something as follows:

Code:

        0     1      ... 9
 0  +0000 +0000
10  +0000 +0000
...
90

Here is the code I've been working with for a while yet have not gotten anywhere. setw() confuses me quite a bit and I don't want to use /t. Each section of the array has either a positive or negative 4 digit value. Forgive if the code if laughable.

Code:

   for( int j = 0; j < MEMSIZE; j++ )
   {
      static int number = 0;
      
      if( j % 10 == 0 )
      {
         cout << endl;
         cout << setw( 2 ) << noshowpos << number;
      }
        
      cout << setw( 5 ) << showpos << setfill( '0' ) << mem[ j ] << '\t';
      
      number += 10;
   }  
}

Any help would be much appreciated!

Code:

#include <iostream>
#include <iomanip>

using namespace std;

int main()
{
    // Display column header
    cout<<"  ";
    for (int col = 0; col < 10; col++)
        cout<< setw(7) << col;
    cout<<'\n';
    // Display row: header-data-newline
    for (int row = 0; row < 11; row++) {
        cout<< setw(2) << right << noshowpos << setfill(' ') << row <<"  ";
        for (int col = 0; col < 10; col++) {
            cout<< setw(5) << left << showpos << setfill('0') << 0 <<"  ";
        }
        cout<<'\n';
    }
}

Dude, you rock! Thanks.

whats say in the variable right and noshowpos and what does setfill do?

right aligns the output to the right. showpos prints a +, noshowpos does the opposite. setfill lets you change the empty space characters set by setw. If you set the field width to 5 and only print 4 real values, the default is to print spaces, ie. setfill(' '), which would be " xxxx". In this case I used setfill to specify leading 0's. The above example would then be "0xxxx".

C++'s iostream manipulators can be confusing. I usually recommend a good reference and just playing around with different combinations until you get a feel for how they work.