Compilare: user.cpp: In function ‘int main()’: user.cpp:9:35: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d%d%d", &n, &k, &hp); ^ user.cpp:11:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", &x); ^ user.cpp:21:8: warning: ‘i’ may be used uninitialized in this function [-Wmaybe-uninitialized] ++i; ^