Compilare: user.cpp: In function ‘int main()’: user.cpp:15:23: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &n); ^ user.cpp:17:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &v[i]); ^ user.cpp:34:34: warning: ‘p’ may be used uninitialized in this function [-Wmaybe-uninitialized] fprintf(out, "%d %d", p + 1, mn); ^