Compilare: user.c: In function ‘main’: user.c:12:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d",&n); ^ user.c:15:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d",&v[i][0]); ^ user.c:8:49: warning: ‘mfn’ may be used uninitialized in this function [-Wmaybe-uninitialized] int n,i,s=0,min=10000001,nr,mnr=1001,fr,mfr,mfn,elem; ^ user.c:42:14: warning: ‘mfr’ may be used uninitialized in this function [-Wmaybe-uninitialized] for(i=mfr-1; i<mfn; i++) ^