fopen with integer in file name

Question

I have a bunch of files systematically numbered like Mesh0Coord.dat, Mesh0Elem.dat, Mesh1Coord.dat, Mesh1Elem.dat, etc. This is what I want to do:

int ID;
FILE *fp;

ID = 0; /* could be 0, 1, 2, etc. and so on for the names of the files */

fp = fopen(“Mesh[ID]Coord.dat”, “r”);

The Mesh[ID]Coord means that the ID integer should be inserted there. Any tips?

use `strcat`. Example: http://stackoverflow.com/questions/308695/c-string-concatenation — Maria Ines Parnisari, Nov 23 '13 at 02:10

score 6 · Answer 1 · answered Nov 23 '13 at 02:12

6

#define MAXFILENAME 100

int ID;
char fn[MAXFILENAME+1];

ID = 10;    
snprintf(fn, MAXFILENAME, "Mesh%dCoord.dat", ID)

fp = fopen(fn, "r");

answered Nov 23 '13 at 02:12

codnodder

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fopen with integer in file name

1 Answers1