c 与mysql连接查询

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

int main() {
    MYSQL *conn;
    MYSQL_RES *res;
    MYSQL_ROW row;

    const char *server = "localhost";
    const char *user = "root";
    const char *password = "your_password";
    const char *database = "your_database";

    conn = mysql_init(NULL);

    if (!mysql_real_connect(conn, server, user, password, database, 0, NULL, 0)) {
        fprintf(stderr, "%s\n", mysql_error(conn));
        exit(1);
    }

    // 执行查询...

    mysql_close(conn);
    return 0;
}

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

int main() {
    MYSQL *conn;
    MYSQL_STMT *stmt;
    MYSQL_BIND bind[1];
    char query[] = "SELECT * FROM users WHERE username = ?";

    conn = mysql_init(NULL);
    mysql_real_connect(conn, "localhost", "root", "your_password", "your_database", 0, NULL, 0);

    stmt = mysql_stmt_init(conn);
    mysql_stmt_prepare(stmt, query, strlen(query));

    memset(bind, 0, sizeof(bind));
    bind[0].buffer_type = MYSQL_TYPE_STRING;
    bind[0].buffer = (char *)malloc(50);
    bind[0].buffer_length = 50;

    printf("Enter username: ");
    scanf("%s", bind[0].buffer);

    mysql_stmt_bind_param(stmt, bind);
    mysql_stmt_execute(stmt);

    // 处理结果...

    mysql_stmt_close(stmt);
    mysql_close(conn);
    return 0;
}