Compilare: user.cpp: In function ‘int main()’: user.cpp:9: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:12: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:8: warning: ‘maxz’ may be used uninitialized in this function user.cpp:8: warning: ‘minz’ may be used uninitialized in this function