C语言实验——一元二次方程Ⅰ

#include <stdio.h>
#include <math.h>
double zxd (int a, int b, int c);
double dxz (int a, int b, int c);
int main()
{
    int a, b, c;
    double t;
    scanf("%d %d %d", &a, &b, &c);
    double x1 = zxd(a, b, c);
    double x2 = dxz(a, b, c);
    if(x1 < x2)
    {
        t = x1;
        x1 = x2;
        x2 = t;
    }
    printf("%.2lf %.2lf\n",x1, x2);
    return 0;
}
double zxd(int a, int b, int c)
{
    double x1;
    x1 = (-b+sqrt(b*b-4*a*c))/(2*a);
    return x1;
}
double dxz(int a, int b, int c)
{
    double x2;
    x2 = (-b-sqrt(b*b-4*a*c))/(2*a);
    return x2;
}