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Program to encode and decode given string

Posted By: Easy Tutor     Category: C Programming     Views: 9920

Write a program that encode and decodes user input string.

Code for Program to encode and decode given string in C Programming


#include <stdio.h>
#include <conio.h>
#include <string.h>

void main(){
     charstring[50],tmp[50];
     int spcnt[50],i,j,c;
     clrscr();
     printf("Enter a string : ");
     gets(string);

     //encode logicfor(i=0;string[i];i++){
     string[i]=string[i]+3;
     }
     textcolor(GREEN);
     printf("\n");
     cprintf("Encoded string is as follow : %s",string);

     //decompressed logicfor(i=0;string[i];i++){
     string[i]=string[i]-3;
     }
     textcolor(GREEN);
     printf("\n");
     cprintf("De-Encoded string is as follow : %s",string);
    getch();
}
  
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Vinay Vinny from Australia Comment on: Oct 16
How to solve this problem?


You have n doors in a row that are all initially closed. You make n passes by the doors. The first

time through, you visit every door and toggle the door (if the door is closed, you open it; if it is

open, you close it). The second time you only visit every 2nd door (door #2, #4, #6, ...). The

third time, every 3rd door (door #3, #6, #9, ...), etc, until you only visit the nth door.

You need to find out what state are the doors in after the last pass? Which are open, which are

closed?

You'll be given number of doors, n.

You need to print out pair of (door_number, state) separated by '\n' aka 'end of line'. See

SAMPLE_OUTPUT for more clarity.

SAMPLE_INPUT:

3

SAMPLE_OUTPUT:

1,open

2,closed

3,closed

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