Compilare: user.cpp: In function ‘int init()’: user.cpp:15: warning: no return statement in function returning non-void user.cpp: In function ‘void read()’: user.cpp:19: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:21: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘int search()’: user.cpp:36: warning: ‘k’ may be used uninitialized in this function