Compilare: user.cpp:11:25: warning: deprecated conversion from string constant to ‘char*’ [-Wwrite-strings] char* inputFileName = "perechi.in"; ^ user.cpp:12:25: warning: deprecated conversion from string constant to ‘char*’ [-Wwrite-strings] char* outputFileName = "perechi.out"; ^ user.cpp: In member function ‘unsigned int FileStream::readNextNumber()’: user.cpp:26:29: warning: converting to non-pointer type ‘unsigned int’ from NULL [-Wconversion-null] unsigned int nextNumber = NULL; ^ user.cpp:27:7: warning: unused variable ‘readStatus’ [-Wunused-variable] int readStatus = fscanf(this->inputStream, "%d", &nextNumber); ^ user.cpp: In member function ‘void FileStream::writeLineInFile(int)’: user.cpp:34:7: warning: unused variable ‘writeStatus’ [-Wunused-variable] int writeStatus = fprintf(this->outputStream, "%d\n", value); ^ user.cpp: In member function ‘void FileStream::writeLineOnConsole(int)’: user.cpp:39:7: warning: unused variable ‘writeStatus’ [-Wunused-variable] int writeStatus = printf("%d\n", value); ^ user.cpp: In function ‘int main()’: user.cpp:144:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int d = 2; d * d <= N; ++d) { ^ user.cpp:151:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < divisorNumber; i++) { ^ user.cpp:153:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = i + 1; j < divisorNumber; j++) { ^ user.cpp:157:48: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if ((firstDivisor / gcd) * secondDivisor == N) { ^