用c语言写一元二次方程的三个系数求方程实根

#include <stdio.h>
#include <math.h>

int main()
{
    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);

    delta = b * b - 4 * a * c;

    if (delta > 0) {
        x1 = (-b + sqrt(delta)) / (2 * a);
        x2 = (-b - sqrt(delta)) / (2 * a);
        printf("方程的实根为：%.2f和%.2f\n", x1, x2);
    } else if (delta == 0) {
        x1 = -b / (2 * a);
        printf("方程的实根为：%.2f\n", x1);
    } else {
        printf("方程无实根\n");
    }

    return 0;
}