WorkOnCreateProcess/projectOnCreateProcess/Solve.c

#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <windows.h>

int main(int argc, char* argv[]) {

    system("chcp 1251>null");

    if (argc != 4) {
        printf("Íåâåðíîå êîëè÷åñòâî àðãóìåíòîâ.\n");
        return 1;
    }

    float a = atof(argv[1]);
    float b = atof(argv[2]);
    float c = atof(argv[3]);

    FILE* output_file = fopen("output.txt", "w");
    if (output_file == NULL) {
        printf("Ôàéë äëÿ âûâîäà íå íàéäåí.\n");
        return 1;
    }

    if (a == 0) {
        fprintf(output_file, "Ýòî íå êâàäðàòíîå óðàâíåíèå\n");
        fclose(output_file);
        return 0;
    }

    //äëÿ ïðîâåðêè äàííûõ
    /*printf("Ïîëó÷åíî àðãóìåíòîâ: %d\n", argc);
    for (int i = 0; i < argc; i++) {
        printf("argv[%d] = %s\n", i, argv[i]);
    }*/

    float discriminant = b * b - 4 * a * c;
    int rootCount = 0;

    if (discriminant > 0) {
        float x1 = (-b + sqrt(discriminant)) / (2 * a);
        float x2 = (-b - sqrt(discriminant)) / (2 * a);
        fprintf(output_file, "Äèñêðèìèíàíò:\n%.1f\n", discriminant);
        fprintf(output_file, "Äâà äåéñòâèòåëüíûõ êîðíÿ:\nx1 = %.1f\nx2 = %.1f\n", x1, x2);
        rootCount = 2;
        printf("Â ôàéë output.txt çàïèñàíû äâà äåéñòâèòåëüíûõ êîðíÿ");
    }
    else if (discriminant == 0) {
        float x = -b / (2 * a);
        fprintf(output_file, "Äèñêðèìèíàíò:\n%.1f\n", discriminant);
        fprintf(output_file, "Îäèí äåéñòâèòåëüíûé êîðåíü:\nx = %.1f\n", x);
        rootCount = 1;
        printf("Â ôàéë output.txt çàïèñàí îäèí äåéñòâèòåëüíûé êîðåíü");
    }
    else {
        fprintf(output_file, "Êîðíåé íåò, ïðè÷èíà -> ");
        fprintf(output_file, "Äèñêðèìèíàíò:\n%.1f\n", discriminant);
        rootCount = 0;
        printf("Â ôàéëå output.txt íåò êîðíåé");
    }

    fclose(output_file);
    return rootCount;
}