Compilare: user.cpp: In function ‘int recursiv(int)’: user.cpp:14: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void recursiv1(int)’: user.cpp:28: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘int main()’: user.cpp:49: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘int recursiv(int)’: user.cpp:24: warning: control reaches end of non-void function