ma solution

Me faisais chier et j'trouvais ça marrant ... dslé ...

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
int main(int ac, char **av)
{
 char buf[BUFSIZ];
 FILE *f_in;
 FILE *f_out[100];
 int cpt=0, i;
 char *file, char_cpt[32];
 f_in = fopen("in", "r");
 file = strdup("out1");
 f_out[cpt] = fopen(file, "w+");
 while((fscanf(f_in, "%s", &buf)) != EOF)
 {
 fprintf(f_out[cpt], "%s", buf);
 fputc('\n', f_out[cpt]);
 if(strncmp(buf, "FIN", 3) == 0)
 {
 free(file);
 cpt++;
 file = malloc(sizeof(char) * strlen("out") + cpt);
 strcpy(file, "out");
 snprintf(char_cpt, 32, "%d", cpt + 1);
 strcat(file, char_cpt);
 f_out[cpt] = fopen(file, "w+");
 }
 }
 for(i=0;i<cpt;i++)
 fclose(f_out[i]);
 free(file);
 fclose(f_in);
 return 0;
}

Ya surement moyen de faire mieux et plus commenté, mais ça a le merite de marcher ... toutes suggestions sont bienvenues