------------文件1------------

import math


def extract(a, b, c):
    if b * b - 4 * a * c < 0:
        print("此方程无解!")
    else:
        x1 = (-b + math.sqrt(b * b - 4 * a * c)) / (2 * a)
        x2 = (-b - math.sqrt(b * b - 4 * a * c)) / (2 * a)
        return(x1, x2)

------------文件2------------

import sys  # 导入SYS模块
sys.path.append(r'C:\\Users\\YAOBUS\\OneDrive\\PYTHON')  # 指定自定义模块的路径
from deffunction import extract  # 导入模块中的函数,请忽略警告
a = float(input("请输入A\n"))
b = float(input("请输入B\n"))
c = float(input("请输入C\n"))
print(extract(a, b, c))
wait = input()