unable to use insert statement in mysql - c++

Question

void database::adduser(std::string username, std::string password, std::string land){
connect();
mysql_query(con, "USE users");
std::stringstream ss;
ss << "INSERT INTO users (username, paswd, land, landx, landy) VALUES (" << "'" << username << "'" << "," << "'" << password <<"'" << "," << "'" << land << "'"<< "50, 50)";
std::string insert;
insert = ss.str();
const char * c = insert.c_str();
mysql_query(con, c);
mysql_close(con);
}
int database::init(){
connect();
mysql_query(con, "USE users");
mysql_query(con, "CREATE TABLE IF NOT EXISTS users(username TEXT, passwd TEXT, land TEXT, landx INT, landy INT)");
mysql_close(con);
return 0;
}
char* database::getpaswd(std::string username){
connect();
mysql_query(con, "USE users");
std::stringstream ss;
ss << "SELECT paswd FROM users WHERE username=" << "'" << username << "'";
std::string insert;
insert = ss.str();
const char * c = insert.c_str();
mysql_query(con, c);
MYSQL_RES *result;
result = mysql_store_result(con);
MYSQL_ROW row;
row = mysql_fetch_row(result);
if(row == NULL){
std::cout << "NO USER OF THAT USERNAME" << std::endl;
return "NOT VALID USERNAME";
}
mysql_free_result(result);
mysql_close(con);
return row[0];
}
bool database::does_exist_user(std::string user){
connect();
mysql_query(con, "USE users");
std::stringstream ss;
ss << "SELECT username FROM users WHERE username=" << "'" << user << "'";
std::string insert;
insert = ss.str();
const char *c = insert.c_str();
mysql_query(con, c);
MYSQL_RES *result;
result = mysql_store_result(con);
MYSQL_ROW row;
row = mysql_fetch_row(result);
if(row == NULL){
mysql_free_result(result);
return false;
}
else{
mysql_free_result(result);
return true;
}
std::cout << "username taken" << std::endl;
return true;
}
void database::edit_land(std::string username, std::string land){
connect();
mysql_query(con, "USE users");
std::stringstream ss;
ss << "UPDATE users SET land=" << "'" << land << "' " << "WHERE username=" << "'" << username << "'";
std::string insert;
insert = ss.str();
const char *c = insert.c_str();
mysql_query(con, c);
mysql_close(con);
}
void database::edit_landX(std::string username, int land){
connect();
mysql_query(con, "USE users");
std::stringstream ss;
ss << "UPDATE users SET landx=" << land << " WHERE username=" << "'" << username << "'";
std::string insert;
insert = ss.str();
const char *c = insert.c_str();
mysql_query(con, c);
mysql_close(con);
}
void database::edit_landY(std::string username, int land){
connect();
mysql_query(con, "USE users");
std::stringstream ss;
ss << "UPDATE users SET landy=" << land << " WHERE username=" << "'" << username << "'";
std::string insert;
insert = ss.str();
const char *c = insert.c_str();
mysql_query(con, c);
mysql_close(con);
}
char* database::getland(std::string username){
connect();
mysql_query(con, "USE users");
std::stringstream ss;
ss << "SELECT land FROM users WHERE username=" << "'" << username << "'";
std::string insert;
insert = ss.str();
const char *c = insert.c_str();
mysql_query(con, c);
MYSQL_RES *result;
result = mysql_store_result(con);
MYSQL_ROW row;
row = mysql_fetch_row(result);
if(row == NULL){
return "ERROR";
}
mysql_close(con);
mysql_free_result(result);
return row[0];
}
char* database::getlandY(std::string username){
connect();
mysql_query(con, "USE users");
std::stringstream ss;
ss << "SELECT landy FROM users WHERE username=" << "'" << username << "'";
std::string insert;
insert = ss.str();
const char *c = insert.c_str();
mysql_query(con, c);
MYSQL_RES *result;
result = mysql_store_result(con);
MYSQL_ROW row;
row = mysql_fetch_row(result);
if(row == NULL){
std::cout << "ERROE ME BOI" << std::endl;
return "ERROR";
}
mysql_close(con);
mysql_free_result(result);
return row[0];
}
char* database::getlandX(std::string username){
connect();
mysql_query(con, "USE users");
std::stringstream ss;
ss << "SELECT landx FROM users WHERE username=" << "'" << username << "'";
std::string insert;
insert = ss.str();
const char *c = insert.c_str();
mysql_query(con, c);
MYSQL_RES *result;
result = mysql_store_result(con);
MYSQL_ROW row;
row = mysql_fetch_row(result);
if(row == NULL){
std::cout << "ERROE ME BOI" << std::endl;
return "ERROR";
}
mysql_close(con);
mysql_free_result(result);
return row[0];
}
void database::connect(){
con = mysql_init(NULL);
if(con == NULL){
std::cout << mysql_error(con) << std::endl;
exit(1);
}
if(mysql_real_connect(con, "127.0.0.1", "root", "password", "users", 3306, NULL, 0) == NULL){
std::cout << "NO BEUNO";
std::cout << mysql_error(con) << std::endl;
exit(1);
}
}
the issue is that I am unable to to use the create user function, but all of the other functions reading from the database work perfectly fine, so my question is why am i unable to use an insert statment in the program but am able to read from the database. It works on teh terminal whan i use mysql -u root -p to enter mysql on the terminal but when run it teh c++ code it does not work.