Compilare: user.cpp: In member function 'BigInt& BigInt::operator=(const BigInt&)': user.cpp:16: warning: comparison between signed and unsigned integer expressions user.cpp: In member function 'BigInt& BigInt::operator=(long long int)': user.cpp:26: warning: no return statement in function returning non-void user.cpp: In member function 'BigInt& BigInt::operator+=(const BigInt&)': user.cpp:40: warning: comparison between signed and unsigned integer expressions user.cpp:39: warning: unused variable 'i' user.cpp:50: warning: comparison between signed and unsigned integer expressions user.cpp:49: warning: unused variable 'x' user.cpp: In member function 'BigInt& BigInt::operator+=(long long int)': user.cpp:69: warning: comparison between signed and unsigned integer expressions user.cpp: In member function 'BigInt& BigInt::operator=(long long int)': user.cpp:26: warning: control reaches end of non-void function user.cpp: In member function 'BigInt& BigInt::operator/=(int)': user.cpp:128: warning: control reaches end of non-void function user.cpp: In member function 'BigInt& BigInt::operator*=(int)': user.cpp:93: warning: control reaches end of non-void function user.cpp: In member function 'BigInt& BigInt::operator+=(long long int)': user.cpp:74: warning: control reaches end of non-void function user.cpp: In member function 'BigInt& BigInt::operator+=(const BigInt&)': user.cpp:61: warning: control reaches end of non-void function