Compilare: user.cpp: In function ‘void preproc()’: user.cpp:21: warning: unused variable ‘q’ user.cpp: In function ‘int main()’: user.cpp:102: warning: unused variable ‘p’ user.cpp:102: warning: unused variable ‘q’ user.cpp:102: warning: unused variable ‘x’ user.cpp:102: warning: unused variable ‘t’ user.cpp:104: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:107: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result