c语言

#include <iostream>
#include <math.h>
int main()
{
    int a = 1;
    int b = 5;
    int c = 6;
    double delta;//判定是否存在解
    double x1;//存放第一个解
    double x2;//存放第二个解

    delta = b * b - 4 * a * c;
    if (delta > 0)
    {
        x1 = (-b + sqrt(delta)) / (2 * a);
        x2 = (-b - sqrt(delta)) / (2 * a);
        printf("该一元二次方程有两个解，x1 = %f, x2 = %f\n", x1,x2);
            
    }
    else if (delta == 0)
    {
        x1 = (-b / (2 * a));
        x2 = x1; //右边赋给左边
        printf("该一元二次方程有一个唯一解，x1 = x2 = %f\n",x1)

            ;
    }
    else
    {
        printf("无解\n")
            ;
    }

}