注意拼写错误,down不是dowm
VS的要求比较苛刻,基础学习还是不推荐用VS
vs毛病多,一般人用不来,初学者可以用dev
看看这个https://blog.csdn.net/a1920993165/article/details/123392164?ops_request_misc=%257B%2522request%255Fid%2522%253A%2522166204341816782350886103%2522%252C%2522scm%2522%253A%252220140713.130102334.pc%255Fall.%2522%257D&request_id=166204341816782350886103&biz_id=0&utm_medium=distribute.pc_search_result.none-task-blog-2~all~first_rank_ecpm_v1~rank_v31_ecpm-1-123392164-null-null.142^v44^control&utm_term=vs%E6%8A%A5%E9%94%99%EF%BC%8C%E4%B8%80%E4%B8%AA%E6%97%A0%E6%B3%95%E8%A7%A3%E6%9E%90%E7%9A%84%E5%A4%96%E9%83%A8%E5%91%BD%E4%BB%A4&spm=1018.2226.3001.4449
vs比较复杂,初学者学习困难,建议从dev开始;还有:注意拼写错误,down不是dowm