/in/foo.cc: In function 'int main()':
/in/foo.cc:19:8: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
 if(a=10)
        ^
/in/foo.cc:19:3: warning: suggest explicit braces to avoid ambiguous 'else' [-Wparentheses]
 if(a=10)
   ^
/in/foo.cc:6:8: warning: unused variable 'j' [-Wunused-variable]
  int i,j,k,a;
        ^
/in/foo.cc:6:10: warning: unused variable 'k' [-Wunused-variable]
  int i,j,k,a;
          ^