Compilare: user.cpp: In function ‘int main()’: user.cpp:50:14: warning: unused variable ‘space’ [-Wunused-variable] char space = fgetc(fin); ^ user.cpp:27:10: warning: unused variable ‘space’ [-Wunused-variable] char space = fgetc(fin); ^ user.cpp:26:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &n); ^