1. A=float(input("请输入A:"))
    2. B=float(input("请输入B:"))
    3. C=float(input("请输入C:"))
    4. delta=B**2-4*A*C
    5. if delta<0:
    6.     print("该方程无解！")
    7. elif delta==0:
    8.     x= B/(-2 * A)
    9.     print("x1=x2=",x)
    10. else:
    11.     x1 = (B + delta ** 0.5) / (-2 * A)
    12.     x2 = (B - delta ** 0.5) / (-2 * A)
    13.     print("x1=",x1)
    14.     print("x2=",x2)
    1. 请输入A:1
    2. 请输入B:-2
    3. 请输入C:3
    4. 该方程无解！
    6. Process finished with exit code 0