Compilare: user.cpp: In function ‘bool CP(char*)’: user.cpp:44:13: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if (s[i]=='E') ^ user.cpp:50:17: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if (s[i]==')') ^ user.cpp:53:17: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if (s[i]==']') ^ user.cpp:38:11: warning: unused variable ‘j’ [-Wunused-variable] int i,j; ^ user.cpp:58:1: warning: control reaches end of non-void function [-Wreturn-type] } ^