diff --git a/ppt例题练习.py b/ppt例题练习.py
new file mode 100644
index 0000000..ded1154
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+++ b/ppt例题练习.py
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+# 计算每个人的总分，排序并输出 
+# 1)增加一个总分列  2)按总分降序排序 3）输出学号、姓名、总分
+
+score=[["101","Mary",80,85,90],
+       ["102","Rose",80,90,95],
+       ["103","Mike",75,72,65],
+       ["104","Peter",65,63,58],
+       ["105","Harry",95,93,88]]
+for i in range(5):
+    zf=score[i][2]+score[i][3]+score[i][4]
+    score[i].append(zf)
+score=sorted(score,key=lambda k:k[5],reverse=True)
+for i in range(5):
+    print("学号{}姓名{}总分{}".format(score[i][0],score[i][1],score[i][5]))
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