[mpich-discuss] MPI i/o like fopen (filename, "rb")

dear, i have a little confused about MPI i/o, because iam new for this programming. i have some question. if i want make some program with this code 1) int get_size(char *filename) { struct stat buf; stat(filename,&buf); int j =buf.st_size; return j; } 2) key = fopen(key_file, "rb"); fread(Kunci, pk, 1, key); for(i=0;i<Nk*4;i++) Key[i]=Kunci[i]; 3) hasil = fopen (file_akhir, "wb"); for (k=0;k<(((block-1)*16)+pad);k++) { fputc(output[k], hasil); } fclose (hasil); how to translate that code into MPI i / o ? thanks a lot for your attention Regards Handana