4.1 求非线性方程实根的对分法ddhrt.c 4.2 求非线性方程一个实根的牛顿法dnewt.c 4.3 求非线性方程一个实根的埃特金迭代法datkn.c 4.4 求非线性方程一个实根的连分式解法dpqrt.c-4.1 The real roots of nonlinear equations of the pairs of sub-law ddhrt.c 4.2 real roots of nonlinear equations of a Newton' s Law of