Compilare: user.cpp: In function ‘int main()’: user.cpp:11: warning: unused variable ‘i’ user.cpp:11: warning: unused variable ‘j’ user.cpp:13: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:15: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result