Program for an output file in any format

In this program I would like to show you how to store your output file .
we can get output file in any format in order to use it for further use.



/* program for an output file */

#include<stdio.h>

int main()
{
  int i, j ;
  FILE *fp ;  //specific  pointer which stores data and transfer it to output file //

 fp= fopen("Output.xslx","w");

/* fopen creates a file if it is not already created otherwise overwrites it depends on the mode  .  " Output.xslx " is output file  name ,it could be anything and any format , "w" stands for writing mode in order to write into file , in order to read from file we use "r" */  

    for(i=0;i<=10;i++)
    {
       j=i+2;
      fprintf(fp, "%d  %d\n", i , j);

// fprintf is used to print output in the file ,just like normal printf with pointer's name //
          }

 fclose(fp);   // in order to close the file //
 return 0;

   }