Compilare: user.cpp:59:29: warning: multi-character character constant [-Wmultichar] if(st[p-1]=='-2') ^ user.cpp:71:29: warning: multi-character character constant [-Wmultichar] if(st[p-1]=='-2') ^ user.cpp: In function ‘int main()’: user.cpp:70:14: warning: ‘j’ may be used uninitialized in this function [-Wmaybe-uninitialized] for(p=j+3;p<=top;p=p+2) ^