Compilare: user.cpp: In function ‘int main()’: user.cpp:61: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:62: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:63: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:65: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:66: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:69: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘int bs(int, int)’: user.cpp:7: warning: ‘last’ may be used uninitialized in this function user.cpp: In function ‘int bsr(int, int)’: user.cpp:26: warning: ‘last’ may be used uninitialized in this function user.cpp: In function ‘int bsl(int, int)’: user.cpp:43: warning: ‘last’ may be used uninitialized in this function