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To store English words, one method is to use linked lists and store a word letter by letter. To save some space, we may let the words share the same s 阅读全文
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字符串反转： string s; reverse(s.begin(),s.end()); 单个数字转字符： string s=""; int n=9; s+=(n+'0'); cout<<s<<endl; 单个字符转数字： char c='9'; int n=c-'0'; cout<<c<<endl 阅读全文
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The Japanese language is notorious for its sentence ending particles. Personal preference of such particles can be considered as a reflection of the s 阅读全文
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Scientific notation is the way that scientists easily handle very large numbers or very small numbers. The notation matches the regular expression [+- 阅读全文
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Look-and-say sequence is a sequence of integers as the following: D, D1, D111, D113, D11231, D112213111, ... where D is in [0, 9] except 1. The (n+1)s 阅读全文
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getline用来读入带空格的字符串 使用方式 getline(cin,st); 注意点： 若scanf或cin与getline一起使用，需要清空scanf或cin的缓冲内容 scanf("%d",&n); char c=getchar(); getline(cin,st); 其中c=getchar 阅读全文
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A Digital Library contains millions of books, stored according to their titles, authors, key words of their abstracts, publishers, and published years 阅读全文
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People often have a preference among synonyms of the same word. For example, some may prefer "the police", while others may prefer "the cops". Analyzi 阅读全文
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If a machine can save only 3 significant digits, the float numbers 12300 and 12358.9 are considered equal since they are both saved as 0 with simple c 阅读全文
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To prepare for PAT, the judge sometimes has to generate random passwords for the users. The problem is that there are always some confusing passwords 阅读全文