def quadratic(a,b,c):
if not isinstance(a,(int,float)) and isinstance(a,(int,float)) and isinstance(a,(int,float)):
raise TypeError('bad operand type')
if a == 0:
print("a值输入错误，请重新输入")
r = bb-(4ac)
if r>0:
x1 =(-b+math.sqrt(r))/(2a)
x2 =(-b-math.sqrt(r))/(2a)
return x1, x2
elif r == 0 :
x1=-b/(2a)
return x1
else:
return print('方程无实数解')
拉普拉丝呦
import math
def quadratic(a,b,c): if not isinstance(a,(int,float)) and isinstance(a,(int,float)) and isinstance(a,(int,float)): raise TypeError('bad operand type') if a == 0: print("a值输入错误，请重新输入") r = bb-(4ac) if r>0: x1 =(-b+math.sqrt(r))/(2a) x2 =(-b-math.sqrt(r))/(2a) return x1, x2 elif r == 0 : x1=-b/(2a) return x1 else: return print('方程无实数解')
print('quadratic(2, 3, 1) =', quadratic(2, 3, 1)) print('quadratic(1, 3, -4) =', quadratic(1, 3, -4))
a=float(input('请输入a')) b=float(input('请输入b')) c=float(input('请输入c')) Key =quadratic(a,b,c) print(Key)
if quadratic(2, 3, 1) != (-0.5, -1.0): print('测试失败') elif quadratic(1, 3, -4) != (1.0, -4.0): print('测试失败') else: print('测试成功')