c语言mysql数据库查询

#include <mysql.h>
#include <stdio.h>

int main() {
    MYSQL *conn;

    conn = mysql_init(NULL);

    if (conn == NULL) {
        fprintf(stderr, "Failed to initialize MySQL connection\n");
        return 1;
    }

    if (mysql_real_connect(conn, "localhost", "username", "password", "database", 0, NULL, 0) == NULL) {
        fprintf(stderr, "Failed to connect to MySQL server: Error: %s\n", mysql_error(conn));
        return 1;
    }

    printf("Connected to MySQL server\n");

    // TODO: 执行查询语句和结果处理

    mysql_close(conn);

    return 0;
}

// ...

if (mysql_query(conn, "SELECT * FROM table")) {
    fprintf(stderr, "Failed to execute query: Error: %s\n", mysql_error(conn));
    return 1;
}

MYSQL_RES *result = mysql_use_result(conn);

if (result == NULL) {
    fprintf(stderr, "Failed to get result: Error: %s\n", mysql_error(conn));
    return 1;
}

MYSQL_ROW row;

while ((row = mysql_fetch_row(result)) != NULL) {
    printf("Column 1: %s, Column 2: %s\n", row[0], row[1]);
}

mysql_free_result(result);

// ...