MySQL C API custom values

I have been working with the tutorial on MySQL C API from http://zetcode.com/tutorials/mysqlcapitutorial/ the following example is working fine:

#include <my_global.h>
#include <mysql.h>

int main(int argc, char **argv)
{

MYSQL *conn;

conn = mysql_init(NULL);
mysql_real_connect(conn, "localhost", "zetcode", "passwd", "testdb", 0, NULL, 0);

mysql_query(conn, "CREATE TABLE writers(name VARCHAR(25))");

mysql_query(conn, "INSERT INTO writers VALUES('Leo Tolstoy')");
mysql_query(conn, "INSERT INTO writers VALUES('Jack London')");
mysql_query(conn, "INSERT INTO writers VALUES('Honore de Balzac')");
mysql_query(conn, "INSERT INTO writers VALUES('Lion Feuchtwanger')");
mysql_query(conn, "INSERT INTO writers VALUES('Emile Zola')");

mysql_close(conn);

}

How can i change the code to accept custom values instead of the hardcoded ones, is it possible to replace writers and ex. Leo Tolstoy with a char pointer or something?

Copyright Notice：Content Author:「VV589」，Reproduced under the CC 4.0 BY-SA copyright license with a link to the original source and this disclaimer.
Link to original article：https://stackoverflow.com/questions/1599415/mysql-c-api-custom-values