Compilare: user.cpp: In function 'void socot(unsigned int)': user.cpp:19: warning: comparison between signed and unsigned integer expressions user.cpp:20: warning: comparison between signed and unsigned integer expressions user.cpp: In function 'int main()': user.cpp:43: warning: comparison between signed and unsigned integer expressions user.cpp:45: warning: comparison between signed and unsigned integer expressions user.cpp: In function 'int fac(int)': user.cpp:11: warning: control reaches end of non-void function