**************************************** * ********************** LQU @ 7gE0m is the result of mysql5.0, describes and uses standard c ++ to demonstrate how to use the MySQL [87PHCAPI function to operate a database in a simple way; T + E {PA ~ 3. the example program passes cKAusPI debugging on VC6 + windows2000. ******/********************************* * ****************************** LQU @ 7gE0 The following is the result of studying mysql 5.0. it is described and demonstrated using the standard c ++ to use MySQL [87PH
C api function: simple database operation process; T + E {PA ~ 3
The example program is debugged on VC6 + windows 2000 using cKAusP = I.
**************************************** * ***********************/A [s <+ P"
# Include 7a7g' my
# Include Hkp> }:#! O _
# Include // The file is located in the F iF7hj4ld Directory of the c api provided by MySQL.
Using namespace std; UuWny}>
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// Add-lmysql qwe yX to linux and other systems)
# Pragma comment (lib, "libmysql. lib")> OY} SzU
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/// Name: main & H [l 8>
// Function: main test function $ S ~ +) '-C
// Access: private Zhf} SMRJ}
// Para: 2> 3bqd |
// 1.: int argc NWg! K!
// Number of system parameters: 'C | # e
// 2.: char * argv [] = pF Vw @ 8
//: The parameter value ICD # RY &
// Return: The exit parameter returned to the startup function <) c4] PW
// Author: hzh nR? K * E & # z
// Date: 2006-06-24 O0 "U = A {O \
/*************************************** * ************************/ZB ^ R \ 2 J
Int main (int argc, char * argv []) cr, ZH: Z
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MYSQL mydata; 7 (l: l
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// Initialize the data structure 7 + {w5 \ 4A
If (mysql_init (& mydata) = NULL) G4G ?; 0 ~ \ 4
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Std: cout <"init mysql data stauct fail" < Return-1; yQ ;{? N, 5 } KZKHXM?
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// Connect to database o m ^> G "!
If (argc = 1) <-~ Fpq | 4x
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If (NULL = mysql_real_connect (& mydata, "127.0.0.1", "root", "mysql5 ",! _ CP ajA
"Hzhdb", MYSQL_PORT, NULL, 0) fS (| z37 ^
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Std: cout <"connect database fail" < Return-1; TZv [B &/
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} Else if (argc = 5) p-Vce # ^ no
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If (NULL = mysql_real_connect (& mydata, argv [1], ++ ySQt
Argv [2], argv [3], argv [4], MYSQL_PORT, NULL, 0) e1Dl7 ^] 9 <
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Std: cout <"connect database fail" < Return-1; t ['! + W!
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Std: cout <"run parameter error" < Return-1; M>! * 6) a +
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Std: string s_ SQL = "drop table hzhtest"; DRA (+ = %
If (mysql_query (& mydata, s_ SQL .c_str ())! = 0) 0 uf 'gbjf
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// Failed to delete table pG {: RU Mysql_close (& mydata); O "$-@ c *
Std: cout <"drop table fail" < } N )! = % * 7
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// Create a data table. The field myid sets the auto-incrementing column attribute a | 20-c1) c
S_ SQL = "create table hzhtest ("; p1xJ) N8Z {
S_ SQL + = "myid integer not null auto_increment,"; 8tv6 ?} T |]
S_ SQL + = "mytime datetime null, myname varchar (30),";> fh [Z: tf
S_ SQL + = "primary key (myid)"; # I = R6
If (mysql_query (& mydata, s_ SQL .c_str ())! = 0) + jP} /
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// Failed to create table _ SrVC $ j
Mysql_close (& mydata); ^ Cd/Ox | u
Std: cout <"create table fail" < < Return-1; mh '8k [H
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// Insert data into the table/-Qu, T)
For (int k = 1; k <30; ++ k) w7h) Ke @ n
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S_ SQL = "insert into hzhtest (mytime, myname) values"; aShy69k: _ V
S_ SQL + = "('2017-06-"; R9 $4 woWi
Char buff [20];) NNs7uN/
Memset (buff, 0, sizeof (buff); xI "'3) q
Itoa (k, buff, 10); F: YQt _
S_ SQL + = buff; J5UJ) Gdb
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S_ SQL + = ""; K (Y4MVI {U;
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Int I = k % 3; (8V5kf}
Memset (buff, 0, sizeof (buff);-k: {H; SK
Itoa (I, buff, 10); clErn0M
S_ SQL + = buff; Sb "{B08q1
S_ SQL + = ": 01: 01 '"; EM *) nW ^ = j
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If (I = 0) ov. \ wNe
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S_ SQL + = ", NULL"; | YTM '8 \} LG
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Else C. U9 (DfA/5
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S_ SQL + = ", 'Huang Zhihui"; s! DxV
S_ SQL + = buff; IPhbq.
S_ SQL + = "'"; 6: IWmt $ S
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S_ SQL + = ")"; qx # z %: Ep
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If (mysql_query (& mydata, s_ SQL .c_str ())! = 0) + * $ c |
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// An error occurred while executing the SQL statement c> M * | (,
Std: cout <"execute insert syntax fail" <2gq + mqEm
Endl < Mysql_close (& mydata); kuh. c #
Return-1; \ Z c/-s \
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// Query data and display 98} A pK
S_ SQL = "select myid, mytime, myname from hzhtest"; YpXA
If (mysql_query (& mydata, s_ SQL .c_str ())! = 0) e & Nm % # 9Z;
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// An error occurred while executing the SQL statement = PaE \
Mysql_close (& mydata );/ Std: cout <"execute SQL syntax fail" <n8SbdhL
Endl <
Return-1; @ t ^ & @: C
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MYSQL_RES * result = mysql_store_result (& mydata); Oq # Sh
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// Obtain the query result I ;! @ '0
Int rowcount = mysql_num_rows (result); MbBoxy
// Obtain valid records) U # Q 1 {O
Std: cout <"exec SQL:" < ^ H! _ E99
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MYSQL_FIELD * fields = NULL; xp NRV = U/
// Obtain the field names j/ds
For (int I = 0; fields = mysql_fetch_field (result); ++ I) {'28> So
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Std: cout < Name <"\ t"; Fc _ & UL "47
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Std: cout < 7m' (MVXg
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// Read the dH C % 4IW "R of each record in sequence
MYSQL_ROW currrow = NULL; e! A: 'w7lm
While (currrow = mysql_fetch_row (result ))! = NULL) EG F4X4srl
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// Read row record jx9mC9] e [
For (int I = 0; I <mysql_num_fields (result); ++ I) rchlorophyll
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Std: cout <(currrow
? Currrow: "NULL") <"\ t"; k e; j [#{
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Std: cout < } 6NK [d
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Mysql_free_result (result); UbY 'f! 2
Mysql_close (& mydata); Q "4 ;! Mme'
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System ("pause"); Oy5v. Z $ J7
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Return 1; _ 9 }
