Export data in columns in a dat format

[hooman12]

Hello guys,

I want to export data (X,U) in a .dat format to open it by Tecplot.
I need something like this.

VARIABLES = "X", "U"
ZONE I=2, F=POINT
1,77
2,41
3,69
4,51
.,.
.,.
.,.
.,.

the problem is that code does not write the value of X,U in two columns.
Help plz!!!

        #include <iostream>
#include <fstream>
using namespace std;
int main () {

          ofstream myfile;
          myfile.open ("MY case");
          myfile << "VARIABLES = X , U \n" ;
          myfile << "ZONE I=2 , F=POINTS \n" ;
           for ( i = 1; i <= n; i++ )
              {
                {cout << X[i] << ' ';}
              }   
           for ( j = 1; j <= n; j++ )
              {
                {cout << X[j] << ' ';}
              }
          myfile.close(); 

return 0;
}

[Rechard3]

this will only work if X is an array of objects of some class you defined, and overloaded the insertion operator so that it prints data in the form:
<X>,<U>new-line-character

otherwise, you'd want to try declaring 2 arrays, one contains the number before the comma, another contains the number after it:

#include <iostream>
#include <fstream>
using namespace std;

const ARRAY_SIZE = somesize;

int main () {

          int X[ARRAY_SIZE];
          int U[ARRAY_SIZE];

           //  . . .
          //some initialization of X and U
          //  . . .

          ofstream myfile;
          myfile.open ("MY case");
          myfile << "VARIABLES = X , U \n" ;
          myfile << "ZONE I=2 , F=POINTS \n" ;
           for ( i = 1; i <= ARRAY_SIZE; i++ )
              {
                {cout << X[i] << ',' << U[i] << std::endl;}
              }   
          myfile.close(); 

    return 0;
}

i hope this is what you want.