def mul(x,*y):
for n in y:
x=x*n
return x
# 测试
print('mul(5) =', mul(5))
print('mul(5, 6) =', mul(5, 6))
print('mul(5, 6, 7) =', mul(5, 6, 7))
print('mul(5, 6, 7, 9) =', mul(5, 6, 7, 9))
if mul(5) != 5:
print('mul(5)测试失败!')
elif mul(5, 6) != 30:
print('mul(5, 6)测试失败!')
elif mul(5, 6, 7) != 210:
print('mul(5, 6, 7)测试失败!')
elif mul(5, 6, 7, 9) != 1890:
print('mul(5, 6, 7, 9)测试失败!')
else:
try:
mul()
print('mul()测试失败!')
except TypeError:
print('测试成功!')
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