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+git show
+111
+333
+
diff --git a/src/mycode.py b/src/mycode.py
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+import matplotlib.pyplot as plt
+import matplotlib.font_manager as fm
+
+# ½ø¼ÛÓëÁãÊÛ¼Û
+basePrice, salePrice = 49, 75
+
+# ¼ÆËãÂònum¸öʱµÄÅú·¢¼Û£¬ÂòµÄÔ½¶à£¬µ¥¼ÛÔ½µÍ
+def compute(num):
+    return salePrice * (1-0.01*num)
+
+# numbersÓÃÀ´´æ´¢¹Ë¿Í¹ºÂòÊýÁ¿
+# earnsÓÃÀ´´æ´¢É̳¡µÄÓ¯ÀûÇé¿ö
+# totalConsumptionÓÃÀ´´æ´¢¹Ë¿ÍÏû·Ñ×ܽð¶î
+# savesÓÃÀ´´æ´¢¹Ë¿Í½ÚÊ¡µÄ×ܽð¶î
+numbers = list(range(1, 31))
+earns = []
+totalConsumption = []
+saves = []
+# ¸ù¾Ý¹Ë¿Í¹ºÂòÊýÁ¿¼ÆËãÈý×éÊý¾Ý
+for num in numbers:
+    earns.append(round(num*(compute(num)-basePrice), 2))
+    totalConsumption.append(round(num*compute(num), 2))
+    saves.append(round(num*(salePrice-compute(num)), 2))
+
+# »æÖÆÉ̼ÒÓ¯ÀûºÍ¹Ë¿Í½ÚÊ¡µÄÕÛÏßͼ£¬ÏµÍ³×Ô¶¯·ÖÅäÏßÌõÑÕÉ«
+plt.plot(numbers, earns, label='É̼ÒÓ¯Àû')
+plt.plot(numbers, totalConsumption, label='¹Ë¿Í×ÜÏû·Ñ', ls='-.')
+plt.plot(numbers, saves, label='¹Ë¿Í½ÚÊ¡', lw=3)
+
+# ÉèÖÃ×ø±êÖáÎı¾
+plt.xlabel('¹Ë¿Í¹ºÂòÊýÁ¿£¨¼þ£©', fontproperties='simhei')
+plt.ylabel('½ð¶î£¨Ôª£©', fontproperties='simhei')
+# ÉèÖÃͼÐαêÌâ
+plt.title('ÊýÁ¿-½ð¶î¹Øϵͼ', fontproperties='stkaiti')
+
+# ´´½¨×ÖÌ壬ÉèÖÃͼÀý
+myfont = fm.FontProperties(fname=r'C:\Windows\Fonts\STKAITI.ttf')
+plt.legend(prop=myfont)
+
+# ¼ÆËã²¢±ê¼ÇÉ̼ÒÓ¯Àû×î¶àµÄÅú·¢ÊýÁ¿
+maxEarn = max(earns)
+bestNumber = numbers[earns.index(maxEarn)]
+# É¢µãͼ£¬ÔÚÏàӦλÖûæÖÆÒ»¸öºìÉ«Îå½ÇÐÇ£¬Ïê¼û8.3½Ú
+plt.scatter([bestNumber], [maxEarn], marker='*', color='red', s=120)
+# ʹÓÃÎı¾±ê×¢±ê¼Ç¸ÃλÖÃ
+plt.annotate(xy=(bestNumber, maxEarn),          # ¼ýÍ·ÖÕµã
+             xytext=(bestNumber-1, maxEarn+200),# ¼ýÍ·Æðµã
+             s=str(maxEarn),                    # ÏÔʾµÄ±ê×¢Îı¾
+             arrowprops=dict(arrowstyle="->"))  # ¼ýÍ·Ñùʽ
+
+# ÏÔʾͼÐÎ
+plt.show()