采用全选主元高斯－约当消去法求解复系数线性代数方程组。其中ar存放复系数矩阵实部，ai存放复系数矩阵虚部。br存放右端复常数向量实部，返回解向量实部；bi存放右端复常数向量虚部，返回解向量虚部。-With full pivoting Gauss- Jordan elimination method for solving linear algebraic equations with complex coefficients. Which ar stored real part of complex coefficient matrix, ai imaginary part of coefficient matrix storage complex. br right end storage complex real constant vector, returns solution vectors of real　bi kept constant vector imaginary part of the right end of rehabilitation, return solution vector imaginary.