Compilare: user.cpp: In function ‘int main()’: user.cpp:23:11: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(a[i]>='1'&&a[i]<='9') ^ user.cpp:47:11: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(a[i]>='1'&&a[i]<='9') ^