Compilare: user.cpp:61:2: warning: no newline at end of file user.cpp: In function 'int main()': user.cpp:17: warning: format '%s' expects type 'char*', but argument 2 has type 'char (*)[20000]' user.cpp:19: warning: format '%s' expects type 'char*', but argument 2 has type 'char (*)[20000]' user.cpp:55: warning: comparison between signed and unsigned integer expressions