Borderou de evaluare (job #373676)

Compilare: user.cpp: In function ‘int main()’: user.cpp:34:24: warning: converting to non-pointer type ‘char’ from NULL [-Wconversion-null] user.cpp:47:24: warning: converting to non-pointer type ‘char’ from NULL [-Wconversion-null] user.cpp:53:24: warning: converting to non-pointer type ‘char’ from NULL [-Wconversion-null] user.cpp:23:16: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] user.cpp:21:16: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] user.cpp:19:12: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses]