date name

git init.txt

 git init
 git fetch https://git.ustc.edu.cn/Mathison/calculator.git
 git remote add origin https://git.ustc.edu.cn/Mathison/calculator.git
-git branch -M Mathison
+git branch -M main
 git add .
 git commit -m "date name"
-git pull --rebase origin Mathison
-git push -u origin Mathison
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+git pull --rebase origin main
+git push -u origin main
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