Compilare: user.cpp: In function ‘int xv(char*)’: user.cpp:11: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘int intt(char*)’: user.cpp:29: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘float expr(char*)’: user.cpp:41: warning: comparison between signed and unsigned integer expressions user.cpp:50: warning: comparison between signed and unsigned integer expressions user.cpp:38: warning: unused variable ‘n’ user.cpp:47: warning: ‘egal’ may be used uninitialized in this function