WinApi/Project6/Source.c

#include <windows.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>

#define BUFFER_SIZE 1024

int main() {
    system("chcp 1251 > nul");

    double a, b, c, discriminant, x1, x2;
    char buffer[BUFFER_SIZE];
    char result[BUFFER_SIZE];
    DWORD lpNumberOfBytesRead;
    DWORD bytesWritten;

    // Îòêðûòèå ôàéëà ñ êîýôôèöèåíòàìè äëÿ ÷òåíèÿ
    HANDLE myFile = CreateFileA("coefficients.txt", GENERIC_READ, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
    if (myFile == INVALID_HANDLE_VALUE) {
        printf("Îøèáêà îòêðûòèÿ ôàéëà coefficients.txt. Îøèáêà: %lu\n", GetLastError());
        return 1;
    }
    printf("Ôàéë äëÿ ÷òåíèÿ óñïåøíî îòêðûò\n");

    // ×òåíèå äàííûõ èç ôàéëà
    while (ReadFile(myFile, buffer, sizeof(buffer), &lpNumberOfBytesRead, NULL)) {
        if (lpNumberOfBytesRead == 0) break;
    }
    CloseHandle(myFile);

    

    // Ñ÷èòûâàíèå êîýôôèöèåíòîâ â áóôåð
    if (sscanf_s(buffer, "%lf %lf %lf", &a, &b, &c) != 3) {
        printf("Íåêîððåêòíûé ôîðìàò âõîäíûõ äàííûõ\n");
        return 0;
    }
    printf("Êîýôôèöèåíòû: a=%.2f, b=%.2f, c=%.2f\n", a, b, c);

    // Ïðîâåðêà êîððåêòíîñòè êîýôôèöèåíòîâ
    if (a == 0 && b == 0) {
        printf("Íåâîçìîæíî ðåøèòü óðàâíåíèå, îáà êîýôôèöèåíòà a è b ðàâíû 0\n");
        snprintf(result, BUFFER_SIZE, "Íåâîçìîæíî ðåøèòü óðàâíåíèå, îáà êîýôôèöèåíòà a è b ðàâíû 0\n");
    
        HANDLE myFileResult = CreateFileA("results.txt", GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
        if (myFileResult == INVALID_HANDLE_VALUE) {
            printf("Îøèáêà ñîçäàíèÿ ôàéëà results.txt. Îøèáêà: %lu\n", GetLastError());
            return 1;
        }
        printf("Ôàéë äëÿ çàïèñè óñïåøíî ñîçäàí\n");

  
        WriteFile(myFileResult, result, strlen(result), &bytesWritten, NULL);
        CloseHandle(myFileResult);

        printf("Ðåçóëüòàò çàïèñàí â ôàéë results.txt\n");
        return 0;
    }

    // Âû÷èñëåíèå äèñêðèìèíàíòà
    discriminant = b * b - 4 * a * c;

  
    if (discriminant > 0) {
        x1 = (-b + sqrt(discriminant)) / (2 * a);
        x2 = (-b - sqrt(discriminant)) / (2 * a);
        snprintf(result, BUFFER_SIZE, "Äèñêðèìèíàíò: %.2f\nÊîëè÷åñòâî êîðíåé: 2\nÊîðåíü 1: %.2f\nÊîðåíü 2: %.2f\n",
            discriminant, x1, x2);
    }
    else if (discriminant == 0) {
        x1 = -b / (2 * a);
        snprintf(result, BUFFER_SIZE, "Äèñêðèìèíàíò: %.2f\nÊîëè÷åñòâî êîðíåé: 1\nÊîðåíü: %.2f\n",
            discriminant, x1);
    }
    else {
        snprintf(result, BUFFER_SIZE, "Äèñêðèìèíàíò: %.2f\nÄåéñòâèòåëüíûõ êîðíåé íåò.\n",
            discriminant);
    }

    // Îòêðûòèå ôàéëà äëÿ çàïèñè ðåçóëüòàòà

    HANDLE myFileResult = CreateFilÝeA("results.txt", GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
    if (myFileResult == INVALID_HANDLE_VALUE) {
        printf("Îøèáêà ñîçäàíèÿ ôàéëà results.txt. Îøèáêà: %lu\n", GetLastError());
        return 1;
    }
    printf("Ôàéë äëÿ çàïèñè óñïåøíî ñîçäàí\n");

    // Çàïèñü ðåçóëüòàòà â ôàéë
    WriteFile(myFileResult, result, strlen(result), &bytesWritten, NULL);
    CloseHandle(myFileResult);

    printf("Ðåçóëüòàò çàïèñàí â ôàéë results.txt\n");
    return 0;
}