Compilare: user.cpp: In function ‘void Add(int)’: user.cpp:26: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void Remove(int)’: user.cpp:49: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void Find(int)’: user.cpp:64: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘int main()’: user.cpp:82: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:88: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result