72 lines
1.3 KiB
Markdown
72 lines
1.3 KiB
Markdown
# python3 简单的算法题
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### 求出1+2+3+..+100的和
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```python
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print("计算1+2+3+...+100的结果：")
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result=0
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for i in range(101):
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result+=i
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print(result)
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```
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### 求出1-2+3-4+..+99 的结果
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```python
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num = 0
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for i in range(100):
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if i % 2 == 1:
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num +=i
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else:
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num -+i
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print(num)
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```
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### 求输入的三个数如何由大到小输出
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```python
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num = input('请输入数字\n')
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num = num.split()
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a,b,c = num
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a,b,c = int(a),int(b),int(c)
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if a > b : a,b = b,a
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if a > c : a,c = c,a
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if b > c : b,c = c,b
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print("输出结果 ： %d %d %d" %(a,b,c)) # 也可以使用sort方法进行排序
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s = [input(),input(),input()]
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s.sort()
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print "输出结果: %s" %s
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```
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### 输出99乘法口诀表
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```python
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for i in range(1,10):
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for j in range(1,10):
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print("%d*%d = %-3d" %(i,j,i*j),end="")
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print()
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# 另一种方法
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c = 0
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while c < 9:
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c +=1
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a = 0
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while a < c:
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a += 1
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print('{} x {} = {}'.format(c,a,a*c),end=" ")
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print()
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```
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### 输入n个数字，排列出有这n个数字组成的不同n位数
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```python
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s = (1, 2, 3, 4)
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for a in s:
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for b in s:
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for c in s:
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if a != b and b != c and c != a:
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print("%d%d%d" % (a, b, c))
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```
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