#define n 100
#include <stdio.h>
void get_matrix(double matrix[n][n], int size);
void exchange(double matrix[n][n], int size);
void write(double matrix[n][n], int size);
int row = 0;
int col = 0;
int main()
{
    int size = 0;
    double matrix[n][n];
    printf("Enter size of matrix: ");
    scanf_s("%d", &size);
    get_matrix(matrix, size);
    exchange(matrix, size);
    write(matrix, size);
    getchar();
    getchar();
    return 0;
}
void get_matrix(double matrix[n][n], int size)
{
    int i = 0, j = 0;
    for (row = 0; row < size; row++)
    {
        for (col = 0; col < size; col++)
        {
            printf("Enter matrix[%d][%d] ", row, col);
            scanf_s("%lf", &matrix[row][col]);
        }
    }
}
void exchange(double matrix[n][n], int size)
{
    int i = 0, j = 0;
    double temp = 0;
    for (i = 0; i < row; i++)
    {
        if (matrix[0][i] == matrix[i][0])
        {
            for (j = 0; j < col; j++)
            {
                temp = matrix[i][j];
                matrix[i][j] = matrix[j][i];
                matrix[j][i] = temp;
            }
        }
    }
}
void write(double matrix[n][n], int size)
{
    int i = 0, j = 0;
    for (i = 0; i < row; i++)
    {
        for (j = 0; j < col; j++)
        {
            printf("matrix[%d][%d] %lf \n", i, j, matrix[i][j]);
        }
    }
}