phuongtrinh.h

Calculator program written by DLLs with the math algorithms such as automata and can draw some simpl

extern "C" void PASCAL EXPORT PhuongTrinhBac1(double a, double b,double &x,int &flag);
extern "C" void PASCAL EXPORT PhuongTrinhBac2(double a, double b, double c, double &x1, double &x2,int &flag);