Compilare: user.c: In function ‘main’: user.c:69:2: warning: passing argument 2 of ‘freopen’ from incompatible pointer type [enabled by default] freopen("cmap.in",stdin,"r"); ^ In file included from user.c:1:0: /usr/include/stdio.h:279:14: note: expected ‘const char * restrict’ but argument is of type ‘struct _IO_FILE *’ extern FILE *freopen (__const char *__restrict __filename, ^ user.c:69:2: warning: passing argument 3 of ‘freopen’ from incompatible pointer type [enabled by default] freopen("cmap.in",stdin,"r"); ^ In file included from user.c:1:0: /usr/include/stdio.h:279:14: note: expected ‘struct FILE * restrict’ but argument is of type ‘char *’ extern FILE *freopen (__const char *__restrict __filename, ^ user.c:70:2: warning: passing argument 2 of ‘freopen’ from incompatible pointer type [enabled by default] freopen("cmap.out",stdout,"w"); ^ In file included from user.c:1:0: /usr/include/stdio.h:279:14: note: expected ‘const char * restrict’ but argument is of type ‘struct _IO_FILE *’ extern FILE *freopen (__const char *__restrict __filename, ^ user.c:70:2: warning: passing argument 3 of ‘freopen’ from incompatible pointer type [enabled by default] freopen("cmap.out",stdout,"w"); ^ In file included from user.c:1:0: /usr/include/stdio.h:279:14: note: expected ‘struct FILE * restrict’ but argument is of type ‘char *’ extern FILE *freopen (__const char *__restrict __filename, ^ user.c:69:9: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("cmap.in",stdin,"r"); ^ user.c:70:9: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("cmap.out",stdout,"w"); ^ user.c:71:7: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.c:72:23: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] for(i=0;i<n;i++)scanf("%lf %lf",&(mirel[i].x),&(mirel[i].y)); ^