Compilare: user.cpp: In function ‘int main()’: user.cpp:10: warning: unused variable ‘ii’ user.cpp:10: warning: unused variable ‘jj’ user.cpp:10: warning: unused variable ‘ok’ user.cpp:13: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:17: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result