Compilare: user.cpp: In function ‘void query(int, int, int, int, int)’: user.cpp:25: warning: unused variable ‘s1’ user.cpp:25: warning: unused variable ‘s2’ user.cpp: In function ‘int main()’: user.cpp:40: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:43: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:48: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result