我正在尝试使用Python从用户输入创建一个数字三角形。我编写了一段代码,但不确定如何在python中做一件事。我想相应地将打印(“下一行”)更改为相应的行。我该怎么做?
代码:
numstr= raw_input("please enter the height:")
rows = int( )
def triangle(rows):
for rownum in range (rows)
PrintingList = list()
print("Next row")
for iteration in range (rownum):
newValue = raw_input("Please enter the next number:")
PrintingList.append(int(newValue))
print()
我的代码有错吗?或者有任何改进建议吗?请告诉我..谢谢......
答案 0 :(得分:1)
您可以将代码更改为此代码:
numstr= raw_input("please enter the height:")
rows = int(numstr )
def triangle(rows):
for rownum in range (rows):
PrintingList = list()
print "row #%d" % rownum
for iteration in range (rownum):
newValue = raw_input("Please enter the number for row #%d:" % rownum)
PrintingList.append(int(newValue))
print()
使用print "%d" % myint
可以打印整数。
答案 1 :(得分:1)
如果我理解了您的问题,请将print("Next row")
更改为print("Row no. %i" % rownum)
。
阅读字符串文档,其中解释了%
格式代码的工作原理。
答案 2 :(得分:1)
我不确定你的程序有什么期望的行为,但这是我的猜测:
numstr= raw_input("please enter the height:")
rows = int(numstr) # --> convert user input to an integer
def triangle(rows):
PrintingList = list()
for rownum in range (1, rows + 1): # use colon after control structure to denote the beginning of block of code
PrintingList.append([]) # append a row
for iteration in range (rownum):
newValue = raw_input("Please enter the next number:")
PrintingList[rownum - 1].append(int(newValue))
print()
for item in PrintingList:
print item
triangle(rows)
这是输出:
please enter the height:3
Please enter the next number:1
()
Please enter the next number:2
()
Please enter the next number:3
()
Please enter the next number:4
()
Please enter the next number:5
()
Please enter the next number:4
()
[1]
[2, 3]
[4, 5, 4]
答案 3 :(得分:0)
n = int(input())
for i in range(n):
out=''
for j in range(i+1):
out+=str(n)
print(out)
这将打印以下内容:
>2
2
22
>5
5
55
555
5555
55555
这是你在找什么?