一元二次方程-526互联

已知文件Coefficient. txt中存有多个方程 ax²+bx+c=0 中系数 a，b，c的值，数据按行排列，编写程序求出方程的解，并将结果写入到 result. txt文件中，要求考虑 a，b，c 各种取值情况。 Coefficient. txt内容举例:

#include <stdio.h>
#include <math.h>

int main() {
    FILE *inputFile = fopen("Coefficient.txt", "r");
    FILE *outputFile = fopen("result.txt", "w");

    if (inputFile == NULL || outputFile == NULL) {
        printf("无法打开文件。\n");
        return 1;
    }

    double a, b, c;
    while (fscanf(inputFile, "%lf %lf %lf", &a, &b, &c) == 3) {
        double discriminant = b * b - 4 * a * c;
        double root1, root2;

        if (a == 0) {
            if (b == 0) {
                if (c == 0) {
                    fprintf(outputFile, "无穷多解\n");
                } else {
                    fprintf(outputFile, "无解\n");
                }
            } else {
                fprintf(outputFile, "线性方程解：x = %.2lf\n", -c / b);
            }
        } else if (discriminant > 0) {
            root1 = (-b + sqrt(discriminant)) / (2 * a);
            root2 = (-b - sqrt(discriminant)) / (2 * a);
            fprintf(outputFile, "两个实根：x1 = %.2lf, x2 = %.2lf\n", root1, root2);
        } else if (discriminant == 0) {
            root1 = -b / (2 * a);
            fprintf(outputFile, "重根：x = %.2lf\n", root1);
        } else {
            double realPart = -b / (2 * a);
            double imaginaryPart = sqrt(-discriminant) / (2 * a);
            fprintf(outputFile, "两个复根：x1 = %.2lf + %.2lfi, x2 = %.2lf - %.2lfi\n", realPart, imaginaryPart, realPart, imaginaryPart);
        }
    }

    fclose(inputFile);
    fclose(outputFile);

    printf("计算完成，结果已保存到result.txt文件中。\n");
    return 0;
}

方程