/in/foo.cc: In function 'int main()':
/in/foo.cc:8:13: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
   for(i=1;i=n;i++){
             ^
/in/foo.cc:6:14: warning: 'i' is used uninitialized in this function [-Wuninitialized]
   int n,i,a[i];
              ^