Compilare: user.cpp: In function ‘int main()’: user.cpp:26:9: warning: unused variable ‘L’ [-Wunused-variable] int L,C; ^ user.cpp:26:11: warning: unused variable ‘C’ [-Wunused-variable] int L,C; ^ user.cpp:27:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &q, &p); ^ user.cpp:30:52: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d%d%d", &l1, &c1, &l2, &c2); ^