ecuatii.cpp: In function 'void numar_x(char*, long int&)': ecuatii.cpp:14: warning: comparison between signed and unsigned integer expressions ecuatii.cpp: In function 'void numar_nrnat(char*, long int&)': ecuatii.cpp:48: warning: comparison between signed and unsigned integer expressions ecuatii.cpp:65: warning: comparison between signed and unsigned integer expressions ecuatii.cpp:66: warning: comparison between signed and unsigned integer expressions ecuatii.cpp:45: warning: 'in' may be used uninitialized in this function ecuatii.cpp: In function 'void numar_x(char*, long int&)': ecuatii.cpp:12: warning: 'in' may be used uninitialized in this function ecuatii.cpp:12: warning: 'nr' may be used uninitialized in this function