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設(shè)備連接是C語言連接數(shù)據(jù)庫的第四步，它包括選擇適當(dāng)?shù)尿?qū)動程序、設(shè)置連接參數(shù)和建立實際的連接。
步驟四：設(shè)備連接
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在連接數(shù)據(jù)庫之前，需要確保已經(jīng)安裝了相應(yīng)的數(shù)據(jù)庫軟件，并且已經(jīng)創(chuàng)建了數(shù)據(jù)庫和表，接下來，我們將介紹如何通過C語言連接到數(shù)據(jù)庫。
1、包含頭文件
在C程序中，我們需要包含一些頭文件來使用數(shù)據(jù)庫相關(guān)的函數(shù)和結(jié)構(gòu)體，這些頭文件通常位于數(shù)據(jù)庫軟件的安裝目錄下的include文件夾中，如果我們使用的是MySQL數(shù)據(jù)庫，那么需要包含以下頭文件：
#include
2、初始化數(shù)據(jù)庫連接
在使用數(shù)據(jù)庫之前，我們需要先初始化一個數(shù)據(jù)庫連接，這可以通過調(diào)用mysql_init()函數(shù)來實現(xiàn)，該函數(shù)需要一個指向MYSQL結(jié)構(gòu)體的指針作為參數(shù)，用于存儲連接信息。
MYSQL *conn;
conn = mysql_init(NULL);
if (conn == NULL) {
fprintf(stderr, "Failed to initialize MySQL connection: %s
", mysql_error(conn));
exit(1);
}
3、設(shè)置連接選項
為了連接到數(shù)據(jù)庫，我們需要設(shè)置一些連接選項，如服務(wù)器地址、用戶名、密碼等，這些選項可以通過調(diào)用mysql_options()函數(shù)來設(shè)置，該函數(shù)需要一個指向MYSQL結(jié)構(gòu)體的指針和一個指向my_option結(jié)構(gòu)體的指針作為參數(shù)。
char *server = "localhost"; char *user = "root"; char *password = "your_password"; char *database = "your_database"; my_bool reconnect = 1; my_bool use_local_timezone = 0; my_bool enable_autocommit = 1; my_bool disable_autocommit = 0; my_bool autocommit = 1; my_bool interactive = 0; my_bool safe_updates = 0; my_bool strict_mode = 0; my_bool ipv6 = 0; my_bool ignore_space = 0; my_bool named_pipe = 0; my_bool port = 0; my_bool compress = 0; my_bool protocol = 0; my_bool ssl_set = 0; my_bool client_flag = 0; my_bool connect_timeout = 0; my_bool read_default_file = 0; my_bool read_default_group = 0; my_bool init_command = 0; my_bool plugin_dir = 0; my_bool secure_auth = 0; my_bool shared_memory = 0; my_bool max_allowed_packet = 0; my_bool tablename = 0; my_bool host_info = 0; my_bool dbinfo = 0; my_bool thread_safety = 0; my_bool show_warnings = 0; my_bool legacy_strings = 0; my_bool lower_case_tablenames = 0; my_bool local_infile = 0; my_bool ignore_dbdir = 0; my_bool enable_load_data = 0; my_bool enable_remote_load = 0; my_bool enable_local_infile = 0; my_bool enable_outfile = 0; my_bool enable_replace = 0; my_bool enable_autoconvert = 0; my_bool enable_delayed_insert = 0; my_bool bulk_inserts = 0; my_bool keep_files = 0; my_bool binlog_direct = 0; my_bool logbin = 0; my_bool server_id = 0; my_bool logerror = 0; my_bool logoutput = 0; my_bool max_connects = 0; my_bool max_connections = 0; my_bool max_allowed_packet = 0; myulong longint conv= ~(ulong)0, unused= ~(ulong)0, net= ~(ulong)0, state= ~(ulong)0, mode= ~(ulong)0, character= ~(ulong)0, result= ~(ulong)0, warnings= ~(ulong)0, status= ~(ulong)0, field= ~(ulong)0, lines= ~(ulong)0, oldPath= ~(ulong)0, newPath= ~(ulong)0, table= ~(ulong)0, argc= ~(ulong)0, value= ~(ulong)0, length= ~(ulong)0, nr= ~(ulong)0, fieldnr= ~(ulong)0, flength= ~(ulong)0, nullbit= ~(ulong)0, isnull= ~(ulong)0, error= ~(ulong)0, dfltvalue= ~(ulong)0, odp= ~(ulong)0, type= ~(ulong)0, internal=(~(ulong)0), extension=~(ulong)0, flags=~(ulong)0, year=~(ulong)0, month=~(ulong)0, day=~(ulong)0, hour=~(ulong)0, minute=~(ulong)0, second=~(ulong)0, newlen=~(ulong)0, decpt=~(ulong)0, truncate=~(ulong)0, name=~(ulong)0, orgpath=~(ulong)0, packname=~(ulong)0, orgname=~(ulong)0, packorgname=~(ulong)0, errarg=~(ulong)0, multibyte=~(ulong)0, charsetnr=~(ulong)0, csname=~(ulong)0, csnamelen=~(ulong)0, csnameptr=~(ulong)0, csnameend=~(ulong)0, comment=~(ulong)0, commlen=~(ulong)0, commptr=~(ulong)
分享名稱：c連接數(shù)據(jù)庫的步驟_步驟四：設(shè)備連接
轉(zhuǎn)載源于：http://m.fisionsoft.com.cn/article/cddoggj.html
