Question

我从c ++示例中获取了sqlconnect：sql connect from c++ 。我想从c ++将数据插入到mysql表中。我只是试图运行第一个示例来摆脱它。请问我该怎么处理？

#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上看到了类似的帖子，但它仍然无法解决！

Answer 1

第65行和第69行的某个地方你有一些奇怪的字符它们可能是不可见的字符，因此在遇到此错误的一般情况下，只需删除整行，然后再次输入。

在这种情况下，你有一些奇怪的字符：

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

你应该删除它，并且进一步向下删除几行。

Answer 2

哪个'类似线程'？最近有一个，并且该问题被描述为由网站上的 copy-pasting 代码引起的，该代码将直引号和破折号翻译成卷曲引号和en-dashes。反过来，这些是使用UTF-8进行音译的，实际上是：

302（八进制）是“Â” - 0xC2 273是“»” - 0xBB

这会产生一个完整有效的UTF8代码“0xC2BB”，发生再次成为字符“»”。现在查看代码中的第65行 - 就像错误消息所说的那样。

错误：从c ++连接mysql时出现程序错误，错误'\'302'

2 个答案: