//一元二次方程
# include <stdio.h>
# include <math.h>
int main (void)
{
//把三个系数保存到计算机
int a = 1;
int b = 2;
int c = 3;
double shizi;//shizi存放的是 b*b - 4*a*c
double x1;//存放一元二次方程的一个解
double x2;//存放一元二次方程的一个解
shizi = b*b - 4*a*c;
if (shizi > 0)
{
x1 = (-b + sqrt(shizi)) / (2*a);
x2 = (-b - sqrt(shizi)) / (2*a);
printf("该方程有两个解,x1 = %f, x2 = %f\n", x1, x2);
}
else if (shizi == 0)
{
x1 = (-b) / (2*a);
x2 = x1;
printf("该方程有一个解,x1 = x2 = %f\n",x1);
}
else (shizi < 0)
{
printf("无解\n");
}
return 0;
}
编译不通过呀