Compilare: user.cpp: In function ‘void init()’: user.cpp:13:18: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(s,1,SZ,f); ^ user.cpp: In function ‘void advance_cursor()’: user.cpp:19:20: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(s,1,SZ,f); ^ user.cpp: In function ‘int main()’: user.cpp:69:32: warning: ‘b’ may be used uninitialized in this function [-Wmaybe-uninitialized] cout<<max<<" "<<a+1<<" "<<b; ^ user.cpp:69:23: warning: ‘a’ may be used uninitialized in this function [-Wmaybe-uninitialized] cout<<max<<" "<<a+1<<" "<<b; ^