c – write the structure to a file

I'm trying to record a struct in a file via the language c. But every time I run the program on xcode nothing is written in the file.

I have tried the system of file permissions, but there is nothing wrong.

code:

//
//  main.c
//  arquivos3
//
#include 
#include 

struct Pessoa{
    char nome(20);
    unsigned int idade;
    float altura;
};

int main(int argc, const char * argv()) {
    // insert code here...
    FILE* ptr;
    char* filename = "arq_teste.dat";
    char* modo_gravacao = "w";
    struct Pessoa pessoa = {"Fernando Santos", 42, 1.75};

    //Abre o arquivo para gravação; se ocorrer erro o programa aborta.
    if ((ptr = fopen(filename, modo_gravacao)) == NULL) {
        puts("Erro ao abrir o arquivo!");
        exit(1);
    }

    fwrite(&pessoa, sizeof(struct Pessoa), 1, ptr);

    fclose(ptr);



    return 0;
}

8 – How to write tests with a specific configuration to test custom access controls?

I've built a custom module that modifies some of the user's routes (see, edit, delete) to do 3 things:

  • Prohibit account modification except for a user with the "Administer users" permission.

  • Prohibit the deletion of an account, except a user with the "Administer users" permission.

  • Prohibit the display of the account page (/user/{user}) unless the account being played has a specific role AND the Boolean field is set to TRUE

Accounts are synchronized from a remote source and logins configured by SSO. It is therefore of no interest to anyone to have access to editing / deleting, except for an admin / dev check if the accounts appear correct.

The first two seem quite simple because they only require the configuration of test users with different role permissions and checking the response of a change or delete route.

For the third, what is the best way to provide a simple configuration for the field to be added to the user entity to test? Do I install all the configuration of my project (seems heavy)? Is there a way to selectively install a configuration for testing purposes only? I think I only need one or two of the 800 configuration files to install. I checked some of the basic tests, but I could not find one close to what I was asking.

c ++ – What is the effective way to write large data into a .csv file?

I'm trying to write big data into a CSV file and the number of lines I'm processing is in millions.

My code generates the rows as an array of duplicates. The code takes a long time to write data to a file (double that writing the same number of records into the database with a bulk insert of 10,000 units on the same machine).

I've tried to buffer the 10000 and 100000 rows in the std :: string.

m_Csvfile.open("Fact.csv", std::ios_base::out | std::ios_base::app);
void class::PrepareRow()
{
    for (int i = 1; i < m_nColumnCount; i++)
    {
        if (arrayOfRowVals(i) != NULL_NUMBER)
        {
            char buffer(50) = {};
            sprintf(buffer, "%9.7lf", arrayOfRowVals(i));
            strBulkcsvString.append(buffer); // strBulkcsvString is std::string
        }

        if (i < m_nColumnCount)
            strBulkcsvString.append(",");
    }
    strBulkcsvString.append("n");
    m_rowcount++;

    if (m_rowcount == 10000)
    {
        m_rowcount = 0;
        strBulkcsvString.clear();
        m_Csvfile << strBulkcsvString.c_str();
        strBulkcsvString.clear();
        m_rowcount = 0;
    }
}

Text prediction – Generator of problems when I write an email or a user name

When I want to write an email or a user name, or when I search for topics, for example. on the overflow of the stack, when I start writing, I immediately see on the screen things that I wrote in the past and sometimes, even if I write something else, the previous entries replace them. This appears when I write to buy on Amazon or when I want to buy a plane ticket, when I want to write tags to a stack overflow site.

How can I neutralize this "help" …?

I'm browsing with Firefox, with a Google keyboard, my phone is a Mi Max 3 running Android 8.1.

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How to write an SRV record when I can not write the SRV record? [on hold]

I'm using Freenom to register my free domain and want to use an SRV record to prevent my MC server users from entering the port (25566, not 25565, which they would not have). no need to write). Freenom does not support SRV recordings, what should I do? Thank you

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glsl – I'd like to learn how to write a shader that only uses a relief map without a normal map

I understand that, for best results, we use a map in height (or hump) and a normal map together.

And I also understand that one can calculate a normal map from a height map using a sobel operator.

But out of curiosity, I'm wondering how the first games that support 3D mapping have been effective.

I found this fragment of code shader that seems to do it, but I'm not sure:
OpenGL Bump Map – Texture artifacts?

If the above code does exactly what I am looking for, can anyone explain the line?

vec3 normalDirection = normalize(tangenteSpace*(texture2D( bump_tex, f_texcoord ).rgb*2.0 - 1.0));

How can you get a normal one from a bump?
I understand what is mathematically tangent space, but how does it work here?
Is it a vec4 or a matrix?

So, basically, my question is this:
How has relief mapping been done without a normal map in the past?

Idiomatic way to write appropriate F # (x) unit + fsunit tests?

I write unit tests using XUnit in F # and I wonder what is the most idiomatic way in the F # sense to write them.

Let's start with a simple case:

BicValidationTests.fs:

module Rm.Bai.Domain.BicValidationTests
open Rm.Bai.Domain.BicValidation
open FsUnit
open Xunit

let shortValidBic    = "MYMB gb 2L"
let expectedShortBic = "MYMBGB2L"
let ok               = Result.Ok
let error            = Result.Error

()
let ``Short Bic should be valid when all rules are respected`` () =
    shortValidBic
    |> validateAndFormat
    |> should equal (ok expectedShortBic)

One thing I do not know too much, it's best to include the values ​​directly, knowing that there is nothing shared between the different functions of test directly in the test functions, such as:

()
let ``Short Bic should be valid when all rules are respected`` () =
    "MYMB gb 2L"
    |> validateAndFormat
    |> should equal (ok "MYMBGB2L")

That seems to be even more the case since the answer that I got here
which seems to indicate that if you have multiple test files, you have to rely on the statement types / classes to contain let variables for things other than primitive types like a number or strings.

For example:

let sepaCompliantBics = (
    "DSXLAD46";
    "KAOLADZOAQC";
    "GFDIATGN";
    "XHOCATENR1X";
    "IMITBEW1";
    "JYPPBEPW807";
    "AHODBGG2";
    "LTQJBGMRKKA";
    "LAHYHRDK";
    ...
)

()
let ``Bics should be valid with SEPA-compliant countries`` () =
    sepaCompliantBics
    |> List.map(fun bic -> (validateAndFormat bic, bic))
    |> List.iter(fun (validation, bic) -> validation |> should equal (ok bic))

sepaCompliantBics in the example above will be put to null it is not the first file of the test project.

The solutions are then:

type Tests() = 
    let ok               = Result.Ok
    let error            = Result.Error

    let sepaCompliantBics = (
        "DSXLAD46";
        "KAOLADZOAQC";
        "GFDIATGN";
        "XHOCATENR1X";
        "IMITBEW1";
        "JYPPBEPW807";
        "AHODBGG2";
        "LTQJBGMRKKA";
        "LAHYHRDK";
        ...
    )

    ()
    let ``Bics should be valid with SEPA-compliant countries`` () =
        sepaCompliantBics
        |> List.map(fun bic -> (validateAndFormat bic, bic))
        |> List.iter(fun (validation, bic) -> validation |> should equal (ok bic))

or:

let getSepaCompliantBics() = (
        "DSXLAD46";
        "KAOLADZOAQC";
        "GFDIATGN";
        "XHOCATENR1X";
        "IMITBEW1";
        "JYPPBEPW807";
        "AHODBGG2";
        "LTQJBGMRKKA";
        "LAHYHRDK";
        ...
    )


()
let ``Bics should be valid with SEPA-compliant countries`` () =
    getSepaCompliantBics()
    |> List.map(fun bic -> (validateAndFormat bic, bic))
    |> List.iter(fun (validation, bic) -> validation |> should equal (ok bic))

or:

()
let ``Bics should be valid with SEPA-compliant countries`` () =
    (
        "DSXLAD46";
        "KAOLADZOAQC";
        "GFDIATGN";
        "XHOCATENR1X";
        "IMITBEW1";
        "JYPPBEPW807";
        "AHODBGG2";
        "LTQJBGMRKKA";
        "LAHYHRDK";
        ...
        // this can be a pretty long list btw
    )
    |> List.map(fun bic -> (validateAndFormat bic, bic))
    |> List.iter(fun (validation, bic) -> validation |> should equal (ok bic))

So I wonder if a long list like in the example above poses a problem if it is set in the test function itself rather than being told on the outside Is it always an idiomatic way to write unit tests with F #?