Compilare: user.cpp: In function ‘int main()’: user.cpp:81: warning: comparison between signed and unsigned integer expressions user.cpp:23: warning: unused variable ‘p’ user.cpp:23: warning: unused variable ‘q’ user.cpp:25: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result