Compilare: user.cpp: In function ‘int main()’: user.cpp:13:10: warning: unused variable ‘numbers’ [-Wunused-variable] int *numbers; ^ user.cpp:15:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(input,"%d",&length); ^ user.cpp:18:37: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(input,"%d ",&element); ^