数组未打印正确的值

Question

我的程序应该从.txt文件中读取20个点并计算两个彼此最大和最小距离的点。我已经多次研究并调试了程序，但不知怎的，调试器正在完全跳过突出显示的点。

该程序似乎有效，但它没有打印正确的值。我的x1和y1坐标不正确。让我们说它应该打印

x1 = pointsarray[coord_1_min][0];
y1 = pointsarray[coord_1_min][1];
x2 = pointsarray[coord_2_min][0];            
y2 = pointsarray[coord_2_min][1]; 

但它改为打印：

x1 = pointsarray[coord_1_min][0];
y1 = pointsarray[coord_1_min][1];
x2 = pointsarray[coord_1_min][1];            
y2 = pointsarray[coord_1_min+1][0]; 

这是我的代码

#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#pragma warning(disable:4996)

int    MenuPrint();
double Distance(double x1, double y1, double x2, double y2);
double LineLength( double pointsarray[][2], int number_of_points, int largest_or_smallest_line, double point1[][2], double point2[][2]);

int main()
{
    double pointsarray[20][2];
    double point1[1][2], point2[1][2];
    double vertex1[1][2], vertex2[1][2], vertex3[1][2];
    double x1,x2,y1,y2,x3,y3;

    int choice = 0;

    int number_of_points = 20;
    {
        double x[20], y[20];

        FILE *point;
        point = fopen("Asn06.txt", "r");

        for(int i = 0; i < number_of_points; i++)
        {
            fscanf_s( point , "%lf,%lf" , &x[i] , &y[i] );
        }

        for (int i=0 ; i < 20; i++)
        {
            pointsarray[i][0] = x[i];
            pointsarray[i][1] = y[i];
        }
    }

    for (int i=0 ; i < 20; i++)
    {
        printf("%lf, %lf\n", pointsarray[i][0],pointsarray[i][1] );
    }

    choice = MenuPrint();

    while (choice == 1 || choice == 2)
    {
        int largest_or_smallest_line = choice;

        LineLength (pointsarray, number_of_points, largest_or_smallest_line, point1, point2);
        x1 = point1[0][0];
        y1 = point1[0][1];
        x2 = point2[0][0];
        y2 = point2[0][1];

        printf("Points are %5.2f, %5.2f and %5.2f, %5.2f\n",x1,y1,x2,y2);
        choice = MenuPrint();
    }

    while (choice == 3 || choice == 4)
    {
        int largest_or_smallest_area = choice;

        AreaDifferenciator (pointsarray, number_of_points, largest_or_smallest_area, vertex1, vertex2, vertex3 );
        x1 = vertex1[0][0];
        x2 = vertex2[0][0];
        x3 = vertex3[0][0];
        y1=  vertex1[0][1];
        y2 = vertex2[0][1];
        y3 = vertex3[0][1];

        printf("Points are %5.2f, %5.2f, %5.2f, %5.2f and %5.2f,%5.2f\n",x1,y1,x2,y2,x3,y3);
        choice = MenuPrint();
    }

    return 0;
}

int MenuPrint()
{
    int choice;

    printf("\nPlease choice a option:\n1> points closest together\n2> points further apart\n3>triangle with the smallest area\n4>triangle with the largest area\n5>exit\n");
    scanf_s("%d", &choice);
    return choice;
}

double Distance(double x1, double y1, double x2, double y2)
{
    double distance;

    distance = sqrt(pow((x1-x2),2)+pow((y1-y2),2));
    return distance;
}

double LineLength (double pointsarray[][1], int number_of_points, int largest_or_smallest_line, double point1[][2], double point2[][2])
{
    if (largest_or_smallest_line = 1)
    {
        double x1, y1, x2, y2;
        double dist, dist_Min;

        int i, j;
        int coord_1_min = 0;
        int coord_2_min = 1;

        x1 = pointsarray[coord_1_min][0];
        y1 = pointsarray[coord_1_min][1];
        x2 = pointsarray[coord_2_min][0];
        y2 = pointsarray[coord_2_min][1];

        dist_Min = Distance( x1, y1, x2, y2);

        for (i = 0; i < 19; i++)
        {
            for (j = i + 1; j < 20; j++)
            {
                x1 = pointsarray[i][0];
                y1 = pointsarray[i][1];
                x2 = pointsarray[j][0];
                y2 = pointsarray[j][1];

                dist = Distance( x1, y1, x2, y2);

                if (dist < dist_Min)
                {
                    coord_1_min = i;
                    coord_2_min = j;
                    dist_Min = dist;
                }
            }
        }

        pointsarray[coord_1_min][0] = x1;
        pointsarray[coord_1_min][1] = y1;
        pointsarray[coord_2_min][0] = x2;
        pointsarray[coord_2_min][1] = y2;

        point1[0][0] = x1;
        point1[0][1] = y1;
        point2[0][0] = x2;
        point2[0][1] = y2;
    }
    else if (largest_or_smallest_line = 2)
    {
        double x1, y1, x2, y2;
        double dist, dist_max;
        int i,j;
        int coord_1_max = 0;
        int coord_2_max = 1;

        x1 = pointsarray[coord_1_max][0];
        y1 = pointsarray[coord_1_max][1];
        x2 = pointsarray[coord_2_max][0];
        y2 = pointsarray[coord_2_max][1];

        dist_max = Distance( x1, y1, x2, y2);

        for (i = 0; i < 19; i++)
        {
            for (j = i + 1; j < 20; j++)
            {
                x1 = pointsarray[i][0];
                y1 = pointsarray[i][1];
                x2 = pointsarray[j][0];
                y2 = pointsarray[j][1];

                dist = Distance( x1, y1, x2, y2);

                if (dist > dist_max)
                {
                    coord_1_max = i;
                    coord_2_max = j;
                    dist_max = dist;
                }
            }
        }

        pointsarray[coord_1_max][0] = x1;
        pointsarray[coord_1_max][1] = y1;
        pointsarray[coord_2_max][0] = x2;
        pointsarray[coord_2_max][1] = y2;

        point1[0][0] = x1;
        point1[0][1] = y1;
        point2[0][0] = x2;
        point2[0][1] = y2;
    }
}