Compilare: user.cpp: In function ‘int main()’: user.cpp:9:24: warning: format ‘%u’ expects argument of type ‘unsigned int*’, but argument 3 has type ‘long long unsigned int*’ [-Wformat=] fscanf (f,"%ull",&n); ^ user.cpp:10:44: warning: format ‘%u’ expects argument of type ‘unsigned int’, but argument 3 has type ‘long long unsigned int’ [-Wformat=] fprintf(g,"%ull",n*(n-1)*(n-2)*(n-3)/24); ^ user.cpp:9:25: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (f,"%ull",&n); ^