java ejb開發(fā) 程序4、語句alter table people add(phone_number varchar2(10)) 的作用是 A 修改表結(jié)構(gòu) B 為people表添加約束，約束名稱是phone_number C 向people表中添加一列，名稱是phone_number，數(shù)據(jù)類型是varchar2，長度是10 D 上述答案均不正確 5、（ ）BLOB和CLOB的區(qū)別在于 A CLOB只能存放字符類型的數(shù)據(jù)，而BLOB沒有任何限制 B BLOB只能存放字符類型的數(shù)據(jù)，而CLOB沒有任何限制 C CLOB只能存放小于4000字節(jié)的數(shù)據(jù)，而BLOB可以存放大于4000字節(jié)的數(shù)據(jù) D BLOB只能存放小于4000字節(jié)的數(shù)據(jù)，而CLOB可以存放大于4000字節(jié)的數(shù)據(jù) 6、存儲(chǔ)過程從本質(zhì)上來講就是 A 匿名的PL/SQL程序塊，它可以被賦予參數(shù) B 命名的PL/SQL程序塊，它可以被賦予參數(shù) C 命名的PL/SQL程序塊，不能被賦予參數(shù) D 匿名的PL/SQL程序塊，不能被賦予參數(shù) 7、（ ）下列關(guān)于日期數(shù)據(jù)類型，哪一個(gè)語句是正確的寫法 A insert into test values( 9999-12-03 ) B insert into test values( 1999-03-02 ) C insert into test values(to_char(1999-06-03, yyyy/dd/mm )) D insert into test
本系統(tǒng)采用A. 系統(tǒng)需求分析報(bào)告(設(shè)計(jì)方法/數(shù)據(jù)流圖/數(shù)據(jù)字典) B. 數(shù)據(jù)庫的信息要求報(bào)告（E—R圖及關(guān)系數(shù)據(jù)模型） C. 數(shù)據(jù)庫的操作和應(yīng)用要求報(bào)告（模塊結(jié)構(gòu)圖<概念結(jié)構(gòu)設(shè)計(jì)及邏輯結(jié)構(gòu)設(shè)計(jì)>） D. 調(diào)試中出現(xiàn)的問題及解決方法（物理設(shè)計(jì),調(diào)試及運(yùn)行，維護(hù)） E. 訪問數(shù)據(jù)庫的方式(ODBC,
Implemented BFS, DFS and A*
To compile this project, use the following command:
g++ -o search main.cpp
Then you can run it:
./search
The input is loaded from a input file in.txt
Here is the format of the input file:
The first line of the input file shoud contain two chars indicate the source and destination city for breadth first and depth first algorithm.
The second line of input file shoud be an integer m indicate the number of connections for the map.
Following m lines describe the map, each line represents to one connection in this form: dist city1 city2, which means there is a connection between city1 and city2 with the distance dist.
The following input are for A*
The following line contains two chars indicate the source and destination city for A* algorithm.
Then there is an integer h indicate the number of heuristic.
The following h lines is in the form: city dist which means the straight-line distance from the city to B is dist.
