Self Reproducing Program (Quine) in C++

quine.cpp

#include <iostream>
#include <string>
#include <vector>

using namespace std;

int main()
{
    auto source = vector<string>{
        "#include <iostream>",
        "#include <string>",
        "#include <vector>",
        "",
        "using namespace std;",
        "",
        "int main()",
        "{",
        "    auto source = vector<string>{",
        "    {SRC}",
        "    };",
        "",
        "    for (auto line : source)",
        "    {",
        "        if (line == \"    {SRC}\")",
        "        {",
        "            for (auto line2 : source)",
        "            {",
        "                cout << \"        \" << '\"';",
        "                for (auto ch : line2)",
        "                {",
        "                    if (ch == '\\\\' || ch == '\"') {",
        "                        cout << '\\\\';",
        "                    }",
        "                    cout << ch;",
        "                }",
        "                cout << '\"' << \",\" << endl;",
        "            }",
        "        }",
        "        else {",
        "            cout << line << endl;",
        "        }",
        "    }",
        "",
        "    return 0;",
        "}",
        "",
    };

    for (auto line : source)
    {
        if (line == "    {SRC}")
        {
            for (auto line2 : source)
            {
                cout << "        " << '"';
                for (auto ch : line2)
                {
                    if (ch == '\\' || ch == '"') {
                        cout << '\\';
                    }
                    cout << ch;
                }
                cout << '"' << "," << endl;
            }
        }
        else {
            cout << line << endl;
        }
    }

    return 0;
}