Compilare: user.cpp: In function ‘int main()’: user.cpp:6: warning: unused variable ‘nrz’ user.cpp:10: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:13: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:6: warning: ‘xz’ may be used uninitialized in this function user.cpp:6: warning: ‘yz’ may be used uninitialized in this function