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2 UGC12889 0.00047 47.27450 3.1 13.31 1.546 0.498 1.314 ~ 0.85 0.100 ~ -21.05 72.458 10.869 0.61 0.61  
4 PGC000004 0.00096 23.08764 5.0 15.39 0.851 0.078 0.186 ~ 0.219 0.015 ~ -18.68 63.264 13.918 0.39 0.40  
6 PGC000006 0.00058 15.88165 -1.0 15.23 0.457 0.169 0.324 ~ 0.708 0.082 ~ -19.46 84.181 18.520 0.34 0.35  
7 PGC000007 0.00122 -0.08326 -3.2 15.54 0.575 0.093 0.467 ~ 0.813 0.056 ~ -19.46 97.347 21.416 0.33 0.34  
10 PGC000010 0.00217 -0.04057 -3.2 15.56 0.562 0.078 0.446 ~ 0.794 0.037 ~ -19.46 98.250 21.615 0.29 0.31  
12 PGC000012 0.00240 -6.37390 1.1 14.05 1.045 0.336 0.199 ~ 0.19 0.022 ~ -20.79 92.153 13.823 0.36 0.37  

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#include
#include
#include
#define BUF 1024
#define pi 3.14159

/* The function reads stings from a txt file. Here, we read GWGCCatalog.txt.(see main function) */

int
readevent( FILE *pFile, int **pgc, char **name, double **rag, double **decg, double **absmag, double **dist)
{
void *pgc1, *name1, *rag1, *decg1, *absmag1, *dist1;
char *temp, *temp1; /* these two variables can be overwritten. */   
int i=0, n=1024; /* n is the buffer. */

if ( !(*pgc=(int *)malloc(n*sizeof(int)))||
  !(*name=(char *)malloc(n*100))||
  !(*rag=(double *)malloc(n*sizeof(double)))||
  !(*decg=(double *)malloc(n*sizeof(double)))||
  !(*absmag=(double *)malloc(n*sizeof(double)))||
  !(*dist=(double *)malloc(n*sizeof(double)))||
  !(temp=(char *)malloc(n*100)) ) /* assume the longth of all strings less than 300 */
printf("memory error11\n";

while (!feof(pFile))
{ fscanf(pFile, "%d %s %e %e %s %s %s %s %s %s %s %s %s %e %e %s %s %s", *pgc+i, *name+i*100, *rag+i, *decg+i, temp, temp, temp, temp, temp, temp, temp, temp, temp, *absmag+i, *dist+i, temp, temp, temp);
i++;
if (i==(n-1)) /*the number of lines is going to be longer than buffer. */
{
  if(!(pgc1=realloc(*pgc, 2*n*sizeof(int)))||
  !(name1=realloc(*name, 2*n*100))||
  !(rag1=realloc(*rag, 2*n*sizeof(double)))||
  !(decg1=realloc(*decg, 2*n*sizeof(double)))||
  !(absmag1=realloc(*absmag, 2*n*sizeof(double)))||
  !(dist1=realloc(*dist, 2*n*sizeof(double)))||
  !(temp1=realloc(temp, 2*n*100))) {
  printf("memory error22\n"; }
*pgc=pgc1;
*name=name1;
*rag=rag1;
*decg=decg1;
*absmag=absmag1;
*dist=dist1;
temp=temp1;
n*=2; } /*double the buffer*/
}   
free(temp);
return i; /* Returning i tell us the accurate number.*/
}


int
main()
{
int i, n; /* n is the number of lines in GWGCCatalog.txt. n1 is that in skymap.txt */
int *pgc;
char *name=NULL;
double *rag, *decg, *absmag, *dist;
FILE *pFile, *out;



if ( !( pFile=fopen("GWGCCatalog.txt", "r")) {
printf ("cannot open the GWGCCatalog.txt file\n";
return 1;}

if ( !( out=fopen("goutput.txt", "w")) {
printf ("cannot open the goutput.txt file\n";
return 1;}

n=readevent(pFile, &pgc, &name, &rag, &decg, &absmag, &dist);

for (i=0; i fprintf(out, "%d, %s, %e, %e, %e, %e \n", pgc, name+i*100, rag, decg, absmag, dist);


free(pgc);
free(name);
free(rag);
free(decg);
free(absmag);
free(dist);

fclose(pFile);
fclose(out);
}
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