Compilare: user.cpp: In function ‘void readFile()’: user.cpp:57:12: warning: unused variable ‘mx’ [-Wunused-variable] int i, mx, j; ^ user.cpp:57:16: warning: unused variable ‘j’ [-Wunused-variable] int i, mx, j; ^ user.cpp:55:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d%d", &k, &n); ^ user.cpp:60:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", &bit[i]); ^ user.cpp: In function ‘void answerQuestions()’: user.cpp:296:38: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%lld%lld", &a, &b); ^