Compilare: user.cpp: In constructor ‘_T::_T(int)’: user.cpp:14:7: warning: converting ‘false’ to pointer type ‘_T*’ [-Wconversion-null] l = false; ^ user.cpp: In function ‘int main()’: user.cpp:118:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &n, &bit); ^ user.cpp:124:36: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &a1, &a2); ^ user.cpp:127:36: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &a1, &a2); ^ user.cpp:130:36: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &a1, &a2); ^ user.cpp:133:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &a1); ^