1 // Test1027-求方程的根.cpp: 定义控制台应用程序的入口点。 2 // 3  4 #include "stdafx.h" 5 #include 
     
       6 int mark = 0; 7 float haha(int a, int b, int c) 8 { 9     float temp = b * b - 4 * a*c;10     if (temp < 0)11     {12         temp = -temp;13         mark = 1;14     }15     else16     {17         mark = 0;18     }19     return sqrt(temp);20 }21 22 int main()23 {24     int a, b, c;25     float result1,result2;26     scanf_s("%d %d %d", &a,&b,&c);27     float h1, h2;28     h1 = -(float)b / (float)(2 * a);29     float h3 = haha(a, b, c)/(2*a);30 31     if (mark == 0)32     {33         h1 = h1 + h3;34         h2 = h1 - h3;35 36         printf("x1=%.3f x2=%.3f", h1, h2);37     }38     else if (mark == 1)39     {40         printf("x1=%.3f+%.3fi ", h1, h3);41         printf("x2=%.3f-%.3fi ", h1, h3);42     }43 44     //printf("%.3f", result);45     return 0;46 }