Compilare: user.cpp: In function ‘void principal()’: user.cpp:114: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:115: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:117: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:121: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘int BinarySearch(int, int, int)’: user.cpp:48: warning: control reaches end of non-void function user.cpp: In function ‘int div(long long int, long long int)’: user.cpp:79: warning: ‘copie’ may be used uninitialized in this function