/in/ex3.c: In function 'answer':
/in/ex3.c:13:13: warning: suggest parentheses around arithmetic in operand of '^' [-Wparentheses]
     if ((b^2-4*a*c)>=0 ) {
            ~^~~~~~
/in/ex3.c:14:36: warning: suggest parentheses around arithmetic in operand of '^' [-Wparentheses]
         k = ((-1 * b) + sqrt(b ^ 2 - 4 * a * c)) / (2 * a);
                                  ~~^~~~~~~~~~~
/in/ex3.c:15:36: warning: suggest parentheses around arithmetic in operand of '^' [-Wparentheses]
         j = ((-1 * b) - sqrt(b ^ 2 - 4 * a * c)) / (2 * a);
                                  ~~^~~~~~~~~~~
/in/ex3.c:22:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^