Use :
There is no ^
operator for root. use sqrt
or pow(base,exp)
.
double d = ( -bb + sqrt( bb*bb - 4*aa*cc ) ) / (2*aa);
double e = ( -bb - sqrt( bb*bb - 4*aa*cc ) ) / (2*aa);
or,
double d = ( -bb + pow(( bb*bb - 4*aa*cc ), 0.5) ) / (2*aa);
double e = ( -bb - pow(( bb*bb - 4*aa*cc ), 0.5) ) / (2*aa);