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#!/usr/bin/env python3
# -*- coding: utf-8 -*-

'N個數(shù)字的平均值'

N = 3
sum = 0
count = 0

while count < N:
    num = float(input('number:'))
    sum = num + sum
    count += 1
average = sum / N
print(type(sum))

print("N: %s, sum: %d ,average: %.2f" % (N, sum, average))
print("N:{}, sum:{} ,average：{:.2f}".format(N, sum, average))
# print("N:{}, sum:{:d} ,average：{:.2f}".format(N, sum, average))

最後註解掉的那一行報錯，ValueError: Unknown format code 'b' for object of type 'float'
我想把sum，例如60.0這樣的浮點數(shù)，整數(shù)輸出