Compilare: user.cpp: In function ‘int main()’: user.cpp:63: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:68: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘int drum(int, int)’: user.cpp:31: warning: ‘i’ may be used uninitialized in this function user.cpp:31: warning: ‘j’ may be used uninitialized in this function