/*****************************************************************
以下是研究 mysql 5.0 得出的結果,描述并使用標準 c 演示了使用 MySQL
C API 函數 簡單操作數據庫的流程;
例子程序在 VC6 windows 2000 上調試通過
*****************************************************************/
#include <windows.h>
#include <iostream>
#include <mysql.h> //文件位于 MySQL 提供的 C API 目錄中
using namespace std; 中國開源社區www.ossforge.com
// linux 等系統中請加入 -lmysql
#pragma comment( lib, "libmysql.lib")
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/*****************************************************************/
///name : main
//function : 主測試函數
//access : private
//para :
// 1. : int argc
// : 系統參數個數
// 2. : char * argv[]
// : 參數數值
//return : 返回給 startup 函數的退出參數
//author : hzh
//date : 2006-06-24
/*****************************************************************/
int main( int argc, char * argv[] )
{
MYSQL mydata; 中國開源社區www.openforge.cn
//初始化數據結構
if(mysql_init(&mydata) == NULL)
{
std::cout<<"init mysql data stauct fail"<<endl;
return -1;
}
//連接數據庫
if(argc == 1)
{
if(NULL == mysql_real_connect(&mydata,"127.0.0.1","root","mysql5",
"hzhdb",MYSQL_PORT,NULL,0))
{
std::cout<<"connect database fail"<<endl<<mysql_error(&mydata)<<endl;
return -1;
}
}else if(argc == 5)
{
if(NULL == mysql_real_connect(&mydata,argv[1],
argv[2],argv[3],argv[4],MYSQL_PORT,NULL,0))
{
std::cout<<"connect database fail"<<endl<<mysql_error(&mydata)<<endl;
return -1;
}
}
else
{
std::cout<<"run parameter error"<<endl;
return -1;
} 中國開源社區www.openforge.cn
std::string s_sql = "drop table hzhtest";
if(mysql_query(&mydata,s_sql.c_str()) != 0)
{
//刪除表失敗
mysql_close(&mydata);
std::cout<<"drop table fail"<<endl<<mysql_error(&mydata)<<endl;
}
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//創建數據表,字段 myid 設置了自增列屬性
s_sql = "create table hzhtest(";
s_sql = "myid integer not null auto_increment,";
s_sql = "mytime datetime null,myname varchar(30),";
s_sql = " primary key(myid))";
if(mysql_query(&mydata,s_sql.c_str()) != 0)
{
//創建表失敗
mysql_close(&mydata);
std::cout<<"create table fail"<<endl
<<mysql_error(&mydata)<<endl;
return -1;
} 中國開源社區www.openforge.cn
//向表中插入數據
for(int k = 1; k < 30; k)
{
s_sql = "insert into hzhtest(mytime,myname) values";
s_sql = "('2006-06-";
char buff[20];
memset(buff,0,sizeof(buff));
itoa(k,buff,10);
s_sql = buff;
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s_sql = " ";
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int i = k % 3;
memset(buff,0,sizeof(buff));
itoa(i,buff,10);
s_sql = buff;
s_sql = ":01:01'"; 中國開源社區www.ossforge.com
if(i == 0)
{
s_sql = ",NULL";
}
else
{
s_sql = ",'黃志輝";
s_sql = buff;
s_sql = "'";
}
s_sql = ")"; 中國開源社區www.openforge.cn
if(mysql_query(&mydata,s_sql.c_str()) != 0)
{
//執行SQL語句出錯
std::cout<<"execute insert syntax fail"<<
endl<<mysql_error(&mydata)<<endl;
mysql_close(&mydata) ;
return -1;
}
}
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//查詢數據并顯示
s_sql = "select myid,mytime,myname from hzhtest";
if(mysql_query(&mydata,s_sql.c_str()) != 0)
{
//執行SQL語句出錯
mysql_close(&mydata);
std::cout<<"execute sql syntax fail"<<
endl<<mysql_error(&mydata)<<endl;
return -1;
} 中國開源社區www.ossforge.com
MYSQL_RES *result = mysql_store_result(&mydata);
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//取得查詢結果
int rowcount = mysql_num_rows(result);
//取得有效記錄數
std::cout<<"exec sql: "<<s_sql.c_str()<<",row count: "<<rowcount<<endl;
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MYSQL_FIELD *fields = NULL;
//取得各字段名
for(int i = 0; fields = mysql_fetch_field(result); i)
{
std::cout<<fields->name<<"\t\t";
}
std::cout<<endl; 中國開源社區www.ossforge.com
//依次讀取各條記錄
MYSQL_ROW currrow = NULL;
while((currrow = mysql_fetch_row(result)) != NULL)
{
//讀行的記錄
for(int i = 0; i < mysql_num_fields(result); i)
{
std::cout<<(currrow[i] ? currrow[i] : "NULL")<<"\t";
}
std::cout<<endl;
} 中國開源社區www.openforge.cn
mysql_free_result(result) ;
mysql_close(&mydata);
system("pause"); 中國開源社區www.ossforge.com
return 1;
}