Compilare: user.cpp: In function ‘int main()’: user.cpp:14:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<t; i++) ^ user.cpp:12:23: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &t); ^ user.cpp:16:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%lld", &n); ^