Compilare: user.cpp: In function ‘void check()’: user.cpp:23: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void back(int)’: user.cpp:33: warning: unused variable ‘cost’ user.cpp:33: warning: unused variable ‘cine’ user.cpp:33: warning: unused variable ‘unde’ user.cpp: In function ‘void bulaneala(int, int)’: user.cpp:52: warning: unused variable ‘i’ user.cpp: In function ‘int main()’: user.cpp:75: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:76: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:77: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:79: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result