From c572d0dfe976d7e27429e8f58a28941d3a2ab46e Mon Sep 17 00:00:00 2001
From: Blue-three <18803415169@163.com>
Date: Mon, 9 Sep 2019 16:15:30 +0800
Subject: [PATCH 1/2] day three

---
 exercises/1901100202/1001S02E03_calculator.py | 53 +++++++++++++++++++
 1 file changed, 53 insertions(+)
 create mode 100644 exercises/1901100202/1001S02E03_calculator.py

diff --git a/exercises/1901100202/1001S02E03_calculator.py b/exercises/1901100202/1001S02E03_calculator.py
new file mode 100644
index 000000000..4c6b280df
--- /dev/null
+++ b/exercises/1901100202/1001S02E03_calculator.py
@@ -0,0 +1,53 @@
+"""
+实现一个简单的计算器
+1 接收用户输入的第一个数字
+2 接受用户输入的运算符
+3 接受用户输入的第二个数字
+4 代码进行判断，计算
+5 显示计算的结果
+"""
+while True:
+    # 实现一个简单的计算器
+    # 1 接收用户输入的第一个数字
+    first_num = input("请输入第一个数字:")
+    first_num = int(first_num)
+    # 2 接受用户输入的运算符
+    symbol = input ("请输入运算符（+,-,*,/）:")
+    # 3 接受用户输入的第二个数字
+    second_num = input ("请输入第二个数字:")
+    second_num = int(second_num)
+    # 4 代码进行判断，计算
+    # 4.1 如果运算符为+，进行加法运算
+    if symbol == "+":
+        result = first_num + second_num
+        print(f'{first_num} {symbol} {second_num} = {result}')
+        # print(result)
+    # 4.2 如果运算符为-，进行减法运算
+    elif symbol == "-":
+        result = first_num - second_num
+        print(f'{first_num} {symbol} {second_num} = {result}')
+        # print(result)
+    # 4.3 如果运算符为*，进行乘法运算
+    elif symbol == "*":
+        result = first_num * second_num
+        print(f'{first_num} {symbol} {second_num} = {result}')
+        # print(result)
+    # 4.4 如果运算符为/，进行除法运算
+    elif symbol == "/":
+        if second_num == 0:
+            result = "除数不能等于0"
+            print(result)
+        else:
+            result = first_num / second_num
+            print(f'{first_num} {symbol} {second_num} = {result}')
+        # print(result)
+    # 4.5 如果输入的符号不正确，提示错误
+    else:
+        result = "输入错误"
+        print(result)
+    # 5 显示计算的结果 显示出完整的格式，eg:1 + 1 = 2
+        # 格式化输出 format
+    # print(result)
+    # print(f'{first_num} {symbol} {second_num} = {result}')
+
+

From a5942b9cd0bc032e67b5fa1fa2df63b23a69afde Mon Sep 17 00:00:00 2001
From: Blue-three <18803415169@163.com>
Date: Tue, 17 Sep 2019 21:31:44 +0800
Subject: [PATCH 2/2] Day 04

---
 exercises/1901100202/1001S02E04_control_flow.py | 12 ++++++++++++
 1 file changed, 12 insertions(+)
 create mode 100644 exercises/1901100202/1001S02E04_control_flow.py

diff --git a/exercises/1901100202/1001S02E04_control_flow.py b/exercises/1901100202/1001S02E04_control_flow.py
new file mode 100644
index 000000000..9b841a135
--- /dev/null
+++ b/exercises/1901100202/1001S02E04_control_flow.py
@@ -0,0 +1,12 @@
+for i in range(1,10):             # 输出9行
+    for j in range(1,i+1):        # 输出与函数相等的列
+        print(str(j)+"×"+str(i)+"="+str(i*j)+"\t",end='')
+    print("")                     # 换行
+
+for a in range(1,10):
+    for b in range(1,a+1):
+        while a % 2 != 0:
+            print(str(b)+'×'+str(a)+'='+str(a*b)+'\t',end='')
+            if a == b:
+                print()
+            break