inverseli 发表于 2018-3-20 22:15
第一项在上边，就是result哪里
计算结果是对的，但是print的结果里没有2/1这项
wyf345491656 发表于 2018-3-20 23:48
计算结果是对的，但是print的结果里没有2/1这项
哦哦{:10_333:}
本帖最后由 夜与晨 于 2018-3-21 20:56 编辑
用了生成器和元组解包
def get_ab(num):
i, a, b = 0, 1, 1
while i <= num:
a, b = b, a + b
i = i + 1
yield str(b) + '/' + str(a), float(b) / float(a)
def output():
sum, num ,str_lv = 0, 19 ,[]
for x , y in get_ab(num):
sum = sum + y
str_lv.append(x)
return str_lv, sum
if __name__ == "__main__":
m,n = output()
print("%s = %.2f" % ('+'.join(m),n))
fm = 1
fz = 2
sz = ""
result = 0.0
for i in range(1, 21):
if sz == "":
sz = sz+str(fz) + "/" + str(fm)
else:
sz = sz + "+" + str(fz) + "/" + str(fm)
result = round(result + fz/fm, 3)
temp = fz + fm
fm = fz
fz = temp
print(sz + "=" + str(round(result, 2)))
def f(n):
if n == 1:
return 2
elif n == 2:
return 3
else:
return f(n - 1) + f(n - 2)
def ff(n):
if n == 1:
return 1
elif n == 2:
return 2
else:
return ff(n - 1) + ff(n - 2)
lis = []
st = ''
num = int(input('请输入自然数：\n'))
for i in range(1, num + 1):
lis.append(f(i) / ff(i))
st = st + str(f(i)) + '/' + str(ff(i)) + '+'
print('%s = %.2f'% (st[:-2], sum(lis)))
a1=1
a2=2
b1=1
b2=1
sum = 0
for i in range(20):
a1 = a1 + a2
tmp = a2
a2 = a1
a1 = tmp
b1 = b1 + b2
tmp = b2
b2 = b1
b1 = tmp
print(str(a1)+'/'+str(b1), end='')
if i != 19:
print('+',end='')
sum += a1/b1
print('=%0.2f' % sum)
def feb():
a, b = 0, 1
while True:
a, b = b, a+b
yield b
def counter():
a, b = feb(), feb()
next(b)
list1 = []
temp = 0.0
for i in range(20):
i, j = next(b), next(a)
list1.append('%d/%d' % (i, j))
temp += i/j
result = '%s = %.2f' % ('+'.join(list1), temp)
return result
def fun():
a, b = 1, 1
for i in range(20):
a, b = b,a + b
yield ("%s/%s"%(b,a))
sum_num = ""
for i in fun():
sum_num += i +"+"
#sum_num = eval(sum_num[:-1])
print(sum_num[:-1]+" =","%.2f"%(eval(sum_num[:-1])))
print(sum_num[:-1]+" =",round((eval(sum_num[:-1])),2))
def fun():
n = 1
z = 2
s = 0
count = 20
while count >0:
s = (z/n) + s
z,n= (n+z),z
count -= 1
print(s)
def n0(num):
x1,x2,times=0,1,1
while times<num:
x1,x2,times=x2,x1+x2,times+1
return x2
def n1(num):
a,b=n0(num+3),n0(num+2)
return str(a)+'/'+str(b),a/b
def n(num):
list1,result=[],0
for i in range(0,num):
list1.append(n1(i))
result+=n1(i)
print('+'.join(list1),end='=')
print('%.2f'%result)
n(20)
def fun114():
s=0
a=2
b=1
str1=''
for i in range(1,21):
if i!=0:
str1+='+'
str1+=str(a)+'/'+str(b)+'+'
s+=a/b
a,b=a+b,a
print('%s'%(str1),'=',round(s,2))
本帖最后由 kinkon 于 2022-9-7 16:20 编辑
def f166(n):
a = b = 1
ans = 0
arr = list()
for i in range(n):
s = '{}/{}'.format(a + b, b)
ans += (a + b) / b
arr.append(s)
a, b = b, a + b
return '{0}={1:.2f}'.format('+'.join(arr), ans)
print(f166(20))