Compilare: user.cpp: In function ‘void read()’: user.cpp:15: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:17: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘int bsearch(int, int)’: user.cpp:23: warning: ‘mid’ may be used uninitialized in this function