Compilare: user.cpp: In function ‘void read()’: user.cpp:21:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d%d", &n, &k); ^ user.cpp:23:34: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &vec[i]); ^ user.cpp: In function ‘int maximum(int, int, int)’: user.cpp:17:1: warning: control reaches end of non-void function [-Wreturn-type] } ^