Compilare: user.cpp: In function ‘int main()’: user.cpp:7:18: warning: format ‘%u’ expects argument of type ‘unsigned int*’, but argument 3 has type ‘long unsigned int*’ [-Wformat=] fscanf(f,"%u",&n); ^ user.cpp:11:18: warning: format ‘%u’ expects argument of type ‘unsigned int’, but argument 3 has type ‘long unsigned int’ [-Wformat=] fprintf(g,"%u",n); ^ user.cpp:7:19: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%u",&n); ^