Compilare: user.cpp: In function ‘int main()’: user.cpp:109:18: warning: unused variable ‘j’ [-Wunused-variable] unsigned int j; ^ user.cpp:38:25: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &n); ^ user.cpp:42:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &v[i]); ^