1234567891011121314#include <iostream>int main(int argc, char *argv[]) { /* An annoying "Hello World" example */ for (auto i = 0; i < 0xFFFF; i++) cout << "Hello, World!" << endl; char c = '\n'; unordered_map <string, vector<string> > m; m["key"] = "\\\\"; // this is an error return -2e3 + 12l;} 123456789101112CREATE TABLE "topic" ( "id" serial NOT NULL PRIMARY KEY, "forum_id" integer NOT NULL, "subject" varchar(255) NOT NULL);ALTER TABLE "topic"ADD CONSTRAINT forum_id FOREIGN KEY ("forum_id")REFERENCES "forum" ("id");-- Initialsinsert into "topic" ("forum_id", "subject")values (2, 'D''artagnian');