Compilare: user.cpp: In function ‘int ord(char)’: user.cpp:11: warning: no return statement in function returning non-void user.cpp: In function ‘int main()’: user.cpp:36: warning: comparison between signed and unsigned integer expressions user.cpp:38: warning: comparison between signed and unsigned integer expressions user.cpp:45: warning: comparison between signed and unsigned integer expressions user.cpp:53: warning: comparison between signed and unsigned integer expressions user.cpp:62: warning: comparison between signed and unsigned integer expressions user.cpp:71: warning: comparison between signed and unsigned integer expressions