Compilare: user.cpp: In function ‘int main()’: user.cpp:18:15: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses] cin>>s+1; ^ user.cpp:32:15: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(s[i]==')') ^ user.cpp:37:15: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(s[i]==']') ^