C语言——求解一元二次方程

#include <stdio.h>

#include <stdlib.h>

#include <math.h>

int main(int argc, char *argv[]) {

       float a,b,c,delta,x1,x2;

       printf("请输入一元二次方程的三个系数：\n");

       scanf("%f %f %f",&a,&b,&c);

       if(a==0)

       {

              printf("分母不能为0\n");

       }

       else

       {

              delta = b*b - 4*a*c;

              if(delta<0)

              {

                     printf("没有实数根");

              }

              else

              {

                     x1 = (-b+sqrt(delta))/(2*a);

                     x2 = (-b-sqrt(delta))/(2*a);

                     printf("x1=%f\n",x1);

                     printf("x2=%f\n",x2);

              }

       }

      

       return 0;

}