Hi rooters, I did follow the suggestion of Rene, which I thank very much, for opeing all file of a directory and I did write the following macro, but it doesn't work. { gROOT->Reset(); //open all files in the current directory void *dirp = gSystem->OpenDirectory("."); const char *afile; while(afile = gSystem->GetDirEntry(dirp)) { printf("file: %s\n",afile); FILE *fp = fopen(afile,"r"); TFile *f = new TFile("./afile.root","RECREATE"); Float_t y; Int_t ncols; Int_t nlines = 0; while (1) { // read data in each file ncols = fscanf(fp,"%f",&y); if (ncols < 0) break; nlines++; } printf(" found %d points\n",nlines); fclose(fp); f->Write(); } } The error message is the following root [2] .x open_read.C file: . found 0 points file: .. found 0 points file: file1 Error: fscanf param[0]=0 must not be 0 FILE:/home/paola/root/macros/open.C LINE:22 What's the problem ? Thanks for any help. Paola.
This archive was generated by hypermail 2b29 : Tue Jan 01 2002 - 17:50:50 MET