Read a file in reverse -from end of file to Beginning of the file

Consider a file that contains the following text,

            Brand New World

After reading the file in the reverse order the result will be

             dlroW weN dnarB

MATLAB CODE:

%Open a text file

fp=fopen('rev.txt');

%Move to the End Of the File

fseek(fp,0,'eof');

%Get the position

fsz=ftell(fp);

%Preallocate the character matrix

M=char(zeros([1 fsz]));

n=1;

%Move one position backward

fseek(fp,-1,'cof');

Here ‘cof’ is Current position of the file

%Read the character

c=fread(fp,1,'*char');

Here the ‘fread’ function reads one data in character format

%Store the character in the matrix

M(1,n)=c;

%Check whether the file pointer has reached the beginning of the file

    while(fseek(fp,-2,'cof')~=-1)

        n=n+1;

        c=fread(fp,1,'*char');

        M(1,n)=c;

    end

fclose(fp);

display(M);

Result:

M =

dlroW weN dnarB