Help me with the do-while loop plz

My problem is in the while loop i.e from line # 32-56

Everything is working fine except until i input the filename that is present in that folder but not in ".txt" format.

i want to receive error that file is not in ".txt"
and if it is in.txt and not exist then a seperate error that file n/A.

and to stop the loop if the file is in .txt format and exists there.. help me plz


OK
Attachment 11507

Error:
Attachment 11508


CODE:

Code:

---

#include <iostream>
#include <fstream>
#include <stdlib.h>
#include <string>

using namespace std;

// Function protos
void init_array(char ascii[63], char myb[64]);

// !! Function protos

int main()
{
//declaration & init
    char ascii[63];
    char myb[64];
    string filename;

    int a=48;
    int b=0;
    int count_filename=0;
    int count_orig=0;
    int chck_name=0;
    fstream in_orig;
    //ofstream test; // for Testing
// !! Declaration
// Input fiile name and open
    //test.open("test.txt");
    init_array(ascii,myb);    // value assigned to array
//    test << ascii;
    do
    {
        cout << "Enter a file name or complete path or 0 to exit:" << endl;
        getline(cin,filename);
        in_orig.open(filename.c_str());
        if (filename == "0")
        {
            exit(1);
        }


        else if (filename.find(".txt") != string::npos)
        {

            if (in_orig.fail())
            {
                cout << "-File doesnot exist at the current location.\n"<< endl;
            }
        }

      else
      cout << "-Only \".txt\" files are suported\n\n";

    }
    while ((in_orig.fail()) || (filename.find(".txt") == string::npos));
// !! filename and open


    return 0;
}


// Functions to Initialize arrays
void init_array(char ascii[63], char myb[64])
{
    // ofstream test1;
    //test1.open("test1.txt");
    int a=48;
    int b=0;

    /* storing values in ascii, i.e
    ={0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,,Q,R,S,T,U,V,W,X,Y,Z,a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z, }*/
    a=48;
    while (a < 123)
    {
        if (((a >= 48) && (a < 58)) || ((a >= 65) && (a <= 90)) || ((a >= 97) && (a <= 122)))
        {
            ascii[b]=a;
            b++;
        }
        if ( b==63)
        {
            ascii[b]=32;
        }
        a++;


    }
// !! Stored in ascii
    //cout  << ascii << endl;
    a=0;
    while (a < 63)
    {
        myb[a]=char(a);
        /*char c;
        c=myb[a]| (char)65;

        //test1 << a << " " << (int)myb[a] << endl;*/
        (int)a++;
    }
    /*char c=myb[1];
    c = c << 6;
    c= c| char(1);
    test1 << c << endl;
    */
}

---

Maybe something like this:

Code:

---

    while (true)
    {
        cout << "Enter a file name or complete path or 0 to exit:" << endl;
        getline(cin,filename);
        if (filename == "0")
            exit(1);
        else if (filename.find(".txt") != filename.size() - 4)
            cout << "-Only \".txt\" files are suported\n\n";
        else
        {
            in_orig.open(filename.c_str());
            if (!in)
                cout << "-File doesnot exist at the current location.\n"<< endl;
            else
                break; // exit loop
        }
    }

---

yeah !! :) thnx alot mate