Compilare: user.cpp: In function ‘int main()’: user.cpp:36:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d", &n); ^ user.cpp:38:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d", &v[i]); ^ user.cpp:28:12: warning: ‘nmax’ may be used uninitialized in this function [-Wmaybe-uninitialized] f[v[ind]] = 1; ^ user.cpp:53:19: note: ‘nmax’ was declared here int max = -1, nmax; ^