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我从这里的 c++ 示例示例中获取了 sqlconnect:sql connect from c++。我想从 C++ 将数据插入到 mysql 表中。我只是想运行第一个示例来摆脱它。请建议我应该注意什么?

#include <stdlib.h>
#include <iostream>

/*
  Include directly the different
  headers from cppconn/ and mysql_driver.h + mysql_util.h
  (and mysql_connection.h). This will reduce your build time!
*/
#include "mysql_connection.h"

#include <cppconn/driver.h>
#include <cppconn/exception.h>
#include <cppconn/resultset.h>
#include <cppconn/statement.h>
#include <cppconn/prepared_statement.h>

using namespace std;

int main(void)
{
cout << endl;
cout << "Let's have MySQL count from 10 to 1..." << endl;

try {
  sql::Driver *driver;
  sql::Connection *con;
  sql::Statement *stmt;
  sql::ResultSet *res;
  sql::PreparedStatement *pstmt;

  /* Create a connection */
  driver = get_driver_instance();
  con = driver->connect("tcp://127.0.0.1:3306", "root", "root");
  /* Connect to the MySQL test database */
  con->setSchema("test");

  stmt = con->createStatement();
  stmt->execute("DROP TABLE IF EXISTS test");
  stmt->execute("CREATE TABLE test(id INT)");
  delete stmt;

  /* '?' is the supported placeholder syntax */
  pstmt = con->prepareStatement("INSERT INTO test(id) VALUES (?)");
  for (int i = 1; i <= 10; i++) {
    pstmt->setInt(1, i);
    pstmt->executeUpdate();
  }
  delete pstmt;

  /* Select in ascending order */
  pstmt = con->prepareStatement("SELECT id FROM test ORDER BY id ASC");
  res = pstmt->executeQuery();

  /* Fetch in reverse = descending order! */
  res->afterLast();
  while (res->previous())
    cout << "\t... MySQL counts: " << res->getInt("id") << endl;
  delete res;

  delete pstmt;
  delete con;

} catch (sql::SQLException &e) {
  cout << "# ERR: SQLException in " << __FILE__;
  cout << "(" << __FUNCTION__ << ") on line " »
     << __LINE__ << endl;
  cout << "# ERR: " << e.what();
  cout << " (MySQL error code: " << e.getErrorCode();
  cout << ", SQLState: " << e.getSQLState() << »
     " )" << endl;
}

cout << endl;

return EXIT_SUCCESS;
}

一切都很好,为什么会出错:

temp.cpp:65:3: error: stray ‘\302’ in program
temp.cpp:65:3: error: stray ‘\273’ in program
temp.cpp:69:3: error: stray ‘\302’ in program
temp.cpp:69:3: error: stray ‘\273’ in program

我在 SO 上看到了类似的线程,但仍然没有解决!

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2 回答 2

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在第 65 行和第 69 行的某处,您有一些奇怪的字符它们可能是不可见的字符,因此在一般情况下,当您遇到此错误时,只需删除整行,然后重新键入即可。

在这种情况下,这里有一些奇怪的字符:

cout << "(" << __FUNCTION__ << ") on line " »
                                            ^^
                                     What's this ?

您可能应该删除它,然后再往下几行。

于 2013-09-05T09:43:02.413 回答
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哪个“相似的线程”?最近有一个问题,该问题被描述为是由一个网站的复制粘贴代码引起的,该网站将直引号和短划线翻译成弯引号和短划线。反过来,这些是使用 UTF-8 音译的,实际上:

302(八进制)是“”——0xC2 273 是“»”——0xBB

这会产生一个完整有效的 UTF8 代码“0xC2BB”,它恰好又是字符“»”。现在查看代码中的第 65 行——正如错误消息所说的那样。

于 2013-09-05T09:46:14.587 回答