求一元二次方程ax2 + bx + c = 0 的根，不管它的根是实根还是复根，有一个根还是两个根。-Find a quadratic equation ax2+ bx+ c = 0 root, regardless of its real roots or roots are complex roots, has a root or two roots.

该程序用于求解一元二次方程，可以高效的计算出方程的解。-The procedure for solving a quadratic equation, you can calculate the effective solution of the equation.

用Java语言实现求解一元二次方程的根，包括实数根和复数根的情况，其中实数根又分为重根和非重根的情况。-Implemented in the Java language a yuan quadratic equation root, including real root and plural situation, the real root and divided into heavy root and the root.

从入门到精通C语言书籍源代码，求一元二次方程的根-From entry to the master C language source code books, for one yuan quadratic equation root