Compilare: user.cpp: In function ‘int main()’: user.cpp:63:43: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d %d %d %d", &A, &B, &P, &M); ^ user.cpp:65:51: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d %lld", &query[i].l, &query[i].s); ^ user.cpp:113:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("secvente3.out", "w", stdout); ^