数据结构（Java语言版）实验指导书-绪论实验.docx

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1、绪论实验答案class Solution/ /存放解int ent;/根个数double xl;double x2;/根2public class 实验 1_2 static Solution solve(double a, double b, double c)/求方程的根Solution s = new Solution ();double d=b*b-4*a*c; if (d 0)s.ent = 0;else if (Math. abs (d) = 0.0001)/等于 0(s.ent = 1;s.xl = (-b + Math.sqrt(d) ) / (2 * a); else s.e

2、nt = 2;s.xl = (-b + Math.sqrt(d) ) / (2 * a);s.x2 = (-b - Math.sqrt(d) / (2 * a); )return s;)static void disp (Solution s)/输出结果if (s.ent = 0)System. out .printin (“无根);else if (s.ent = 1)System.out.printf (4可艮为.Ifnn, s.xl); elseSystem, out: printf (两个根为 .If H%.lfnn, s.xl, s . x2); ) public static vo

3、id main(String args) Solution s;double a = 2, b = -3, c = 4;System. out .printf (n 测试 ln);System.out.printf(na=%.If, b=%.If, c=%.If ”, a, b, c); s = solve(a, b, c);disp(s); a = 1;-2;测试2n”);a=%.lf, b=%.lf, c=%.lf ”, a, b, c);测试3nn);a=%.If, b=%lf, c=%.If ”, a, b, c);c = 1;System.out.printf(Hn System.out.printf( s = solve(a, b, c); disp (s);a = 2;b = -1;c = -1;System.out.printf(n System.out.printf( s = solve(a, b, c);disp(s);