Compilare: user.cpp: In function ‘void citire()’: user.cpp:8: warning: unused variable ‘d1’ user.cpp:8: warning: unused variable ‘d2’ user.cpp:9: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:14: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘void back(int)’: user.cpp:133: warning: unused variable ‘d1’ user.cpp:133: warning: unused variable ‘d2’ user.cpp: In function ‘void afisare()’: user.cpp:155: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result