Transpose Array V2

#include <stdio.h>
#include <stdlib.h>
#define MAX 16
#define MAX_STR_LEN 64

FILE * my_fopen(char *);
void get_array(int [MAX][MAX], int *, int *);
void put_array(int [][MAX], int, int);
void transpose_array(int [][MAX], int *, int *);

main()
{
    int array[MAX][MAX], rows=0, columns;
    get_array(array, &rows, &columns);
    transpose_array(array, &rows, &columns);
    put_array(array, rows, columns);
    return 0;
}

FILE * my_fopen(char * mode){
    FILE * fp;
    char filename[MAX_STR_LEN];
    printf("Insert %s file name: ", (mode[0]=='r')?("input"):("output"));
    scanf("%s", filename);
    if((fp=fopen(filename, mode))==NULL)
        abort();
    return fp;
}

void get_array(int array[MAX][MAX], int * r, int * c){
    int i, j, temp;
    FILE * fp=my_fopen("r");
    fscanf(fp, "%d", c);
    while(feof(fp)==0)
        if(1==fscanf(fp, "%d", &temp))
            ++*r;
    *r/=*c;
    rewind(fp);
    fscanf(fp, "%d", &temp);
    for(i=0;i<*r;i++)
        for(j=0;j<*c;j++)
            fscanf(fp, "%d", &array[i][j]);
    fclose(fp);
}

void transpose_array(int array[][MAX], int * m, int * n)
{
    int i, j;
    *m^=*n^=*m^=*n;
    for(i=0;i<*m;i++)
        for(j=i+1;j<*n;j++)
            array[i][j]^=array[j][i]^=array[i][j]^=array[j][i];
}

void put_array(int array[][MAX], int r, int c){
    int i, j;
    FILE * fp=my_fopen("w");
    for(i=0;i<r;i++)
        for(j=0;j<c;j++)
            fprintf(fp, "%d%c", array[i][j], (j==c-1)?('\n'):('\t'));
    fclose(fp);
}