mysql插入变量值

    double rtvalue[80]={0.0};

    char ins[240];
    sprintf(ins, "insert into rtmeasurement(param1, param2, param3, param4, param5) values('%f', '%f', '%f', '%f', '%f')", rtvalue[0], rtvalue[1], rtvalue[2], rtvalue[3], rtvalue[4]);
    if(mysql_query(conn, ins))
    {
        fprintf(stderr, "%s\n", mysql_error(conn));
        fprintf(stderr, "%s\n", ins);
        return 1;
    }