c++ - 为什么这个插入给出语法错误

Question

res = PQexec(conn,"INSERT INTO worker (fullname,type) VALUES ('"ptr"',"type")");

type 是整数，ptr 是字符串。这里有什么问题？我该如何解决？ “”是不是有问题

Answer 1

代替

res = PQexec(conn,"INSERT INTO worker (fullname,type) VALUES ('"ptr"',"type")");

使用字符串流创建字符串

#include <sstream>
std::stringstream ss;

ss << "INSERT INTO worker (fullname,type) VALUES ('" << ptr << "'," << type << ")";
res = PQexec(conn, ss.str().c_str() );