Compilare: user.cpp: In function ‘int main()’: user.cpp:22:18: warning: unused variable ‘h’ [-Wunused-variable] int k, n, r, h, i, j, dr, p; ^ user.cpp:22:27: warning: unused variable ‘dr’ [-Wunused-variable] int k, n, r, h, i, j, dr, p; ^ user.cpp:22:31: warning: unused variable ‘p’ [-Wunused-variable] int k, n, r, h, i, j, dr, p; ^ user.cpp:34:27: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d ", &n); ^