[Exercise 03] Caesar Cipher Decoder

Question

You have received an encrypted message from Julius Caesar-- the message is ebiil.  You are asked to decipher the message in order to understand what Caesar trying to say to you.

Hint

Luckily, Caesar has given you a hint, he says: 'I, myself, encoded the message by shifting every word backwards by 3.' 

Solution

Write a program that receives 5 characters 'ebiil'. Then decode those characters into 5 new characters.

Example

#include <stdio.h>

int main(int argc, char *argv[]) {


	char a;
    	char b;
	 	
	scanf("%c%c", &a, &b);
	
	//decode the message how??
	
	printf("%c%c", a,b);
	
	return 0;
}

Input

ebiil

 

 

 

 

 

 

 

 

 

 

Output

hello

** REMEMBER ** 
This is an online-compiler, don't put anything except the codes. If you want to make a comment, please use // or /* */

Answer 1

Hidden content!
#include<stdio.h>

int main (int argc,char *argv)
{
    char a;
   * ******  ***  *  *    * *   **   b;
  * *  * *** *  ***   ***    ** *  c;
*****    * *      ** *****  *  *  *   d;
* * ** ***       **  ** ** *  * ** e;

***  * ** ***  *   ****   ***   *** **  * ****   *** ****   **   * ***** *  * * **  ** * **** 

**   *** **    *     * * ** **** *
*  **  **  ** *****  *  **  **
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*  *   * *   ****  *   *  **
  * * *  **** ****   * ****  ****

  *******         *** **    ***   **** ** * *  ** **  ****
* **      * ** **     * **   *  0;
}

Comments

Case 0: Correct output
Case 1: Wrong output

Answer 2

Hidden content!
#include   *     * *  *  
int main(int argc, char *argv[]) {


 **   * **    ***** char a;
 * * ***    * * ** ***   * b;
  * *  **      * *** * ** ** c;
  * *   *  *   *** *** * *  *  **  d;
  *    *  *** *****     ***      e;
*  * *   **   * *  *  **   * **** *** 
**     * * **** *  * ** ***   ** *  *  *** *  **   **   *  **    **      ******* 
  *** **    ***** 
  *****     **** * * * the message how??
     ****  *     *** 
* ***** ******** * * **   *  ** *  *    *** *    **  * 
** * * **   *    *  
 *****   *** return 0;
}

Comments

prog.c: In function 'main':
prog.c:10:2: warning: implicit declaration of function 'scanf' [-Wimplicit-function-declaration]
  scanf("%c%c%c%c%c", &a, &b, &c, &d, &e);
  ^~~~~
prog.c:10:2: warning: incompatible implicit declaration of built-in function 'scanf'
prog.c:10:2: note: include '<stdio.h>' or provide a declaration of 'scanf'
prog.c:14:2: warning: implicit declaration of function 'printf' [-Wimplicit-function-declaration]
  printf("%c%c%c%c%c", a+3,b+3,c+3,d+3,e+3);
  ^~~~~~
prog.c:14:2: warning: incompatible implicit declaration of built-in function 'printf'
prog.c:14:2: note: include '<stdio.h>' or provide a declaration of 'printf'

---

Case 0: Correct output
Case 1: Wrong output

Answer 3

Hidden content!
int main(int argc, char *argv[]) {


 *  *     char a;
 *   **  * ****** ** *  *** * b;
**        *   char c;
   *    *  ***  * **  ***  *  d;
 ** ***** ** * **   * **** ***   e;
* ** **  **   **  ** * ***** *      ***    
    * * *** %c %c %c %c  *** *      *****   *   **    * *    ******   ******
* **    
       * **** *   ** * *  *** **  *     ***  ** ** * **** *   * *   ** ****      ** *
** **    **** **   *       *    
**    **    **  * * *********  * 
 ** **   *    **   ***  * 
*  * * ** *  * *      ** * ***
 ****    **   * * ** *  * * ** ** 
     * * * **  * *******  *** *      ** ****** *   *  
 * *** * *  ***  *****     
**  *  ** ** *     0;
}

Comments

prog.c: In function 'main':
prog.c:10:2: warning: implicit declaration of function 'scanf' [-Wimplicit-function-declaration]
  scanf("%c %c %c %c %c %c", &a, &b,&c, &d,&e);
  ^~~~~
prog.c:10:2: warning: incompatible implicit declaration of built-in function 'scanf'
prog.c:10:2: note: include '<stdio.h>' or provide a declaration of 'scanf'
prog.c:10:25: warning: format '%c' expects a matching 'char *' argument [-Wformat=]
  scanf("%c %c %c %c %c %c", &a, &b,&c, &d,&e);
                         ^
prog.c:12:6: warning: assignment makes integer from pointer without a cast [-Wint-conversion]
  if(a="e",b="b",c="i",d="i",e="l")
      ^
prog.c:12:12: warning: assignment makes integer from pointer without a cast [-Wint-conversion]
  if(a="e",b="b",c="i",d="i",e="l")
            ^
prog.c:12:18: warning: assignment makes integer from pointer without a cast [-Wint-conversion]
  if(a="e",b="b",c="i",d="i",e="l")
                  ^
prog.c:12:24: warning: assignment makes integer from pointer without a cast [-Wint-conversion]
  if(a="e",b="b",c="i",d="i",e="l")
                        ^
prog.c:12:30: warning: assignment makes integer from pointer without a cast [-Wint-conversion]
  if(a="e",b="b",c="i",d="i",e="l")
                              ^
prog.c:14:2: warning: implicit declaration of function 'printf' [-Wimplicit-function-declaration]
  printf("hello");
  ^~~~~~
prog.c:14:2: warning: incompatible implicit declaration of built-in function 'printf'
prog.c:14:2: note: include '<stdio.h>' or provide a declaration of 'printf'
prog.c:18:5: warning: incompatible implicit declaration of built-in function 'printf'
     printf("errol");
     ^~~~~~
prog.c:18:5: note: include '<stdio.h>' or provide a declaration of 'printf'

Answer 4

Hidden content!
 **  ***  ***  ** **

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*** *  * *
* =  * *  *
*  =  ***   
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e =  * *
* =    
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****** *  
**  * ** 
** * * *
*   *  
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Comments

Case 0: Correct output
Case 1: Wrong output

Answer 5

Hidden content!
* ***   *    * ** * * 

  * ***   **   * ***  {

  * * 
  = * ** * 
 * = ******* 
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e = *  *
* =  **
* = **
* = **

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**  * ** 
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**** **  * *    *** *  **  **  *  * * *

Comments

Case 0: Correct output
Case 1: Wrong output

Answer 6

Hidden content!
#include **   ** ** *  *
#include *  * * ****  

int main(int argc, char *argv[]) {
   * **      *** *  ** ******* * letterj;
   ** * ***  * *  * * * * *** ** letteri;
** *    ** **  * * **  **** *  letterm;
****  *  **  *   ** *** ** * lettere;
  *  * *    **** * *  ** ** lettern;
**  *    ** ****  *  * *
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 * * ***   *   **  * **** *   ** 
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**    *  ***  ** ***   * *  ***  *  ***  +3;
**  * *   * *   *  *     **   *    +3;
*  *  * * *  **** *  *     ***   ****    +3;
 * *   ** * *     ****         ****   * +3;
** **  **    ** ** * *** *** **  * * +3;
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         *  ***** *    *
** ** * * * * *     *   ** * 0;
}


INPUT
***** **  ****     *
  *****   **** 
OUTPUT
  *  * *****  

Comments

prog.c:27:1: error: unknown type name 'INPUT'
 INPUT
 ^~~~~
prog.c:30:1: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'OUTPUT'
 OUTPUT
 ^~~~~~
prog.c:30:1: error: unknown type name 'OUTPUT'

Answer 7

Hidden content!
 ***** *  ***  * ***

int ****    argc, char ** ** {


 ****  **  * *** char a;
**  ***    ***   ** **   *  ** ** ** *   ****  char b;
 *    ** ****   **  *  **   * * ** 
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**  **   ****  
*      *** *   * *     * the ***    how??
 * ** * ** * ** 
   *        *   *  ****  *  *****     a,b);
*   **      *   
 *    *  *   * *   * * 0;
}

Comments

Case 0: Wrong output
Case 1: Wrong output

Answer 8

Hidden content!
#include  **   **** **

int main(int argc, char *argv[])
{
*  *** ** * *  ** letterj;
 *** * *   * ** **  * *       letteri;
     ** *** **  **      **** letterm;
** *  * **  * * **  ******     *   lettere;
 * ** * **  *** **  * ***** **  lettern;
** * ** **  **  ** * **   **
 **    **  * *   ** *  ** *  * *      * **** input the letter to encode: **     ** * * * 
       ** * **   *   ** * * * * **  * *****  * * *      *  ** ***        *  ** *   * * **  **  *  ** ** *   ** *    *
    * *** ** *     ******   
 ** *****  *      ** **** * = letterj +3;
* ** ****  *   **  * * ** * = letteri +3;
***   **   ***  *   ** *  *  **    = letterm +3;
**     *    ** * * ** ** *   **   = lettere +3;
****   *** *  * * ** *** ** = lettern +3;
*  **  ** * ** **   
*  **** * * ** *******   ****  *   *    *   **  *      **  **    ***   lettere, lettern);
* **    * *****  * *   **   **

   **   ** ***  *  0;
}

Comments

Case 0: Wrong output
Case 1: Wrong output

Answer 9

Hidden content!
**   ***  **  * *  * **

 *  *     *    * *   ** *  {

*    ** 
  =  *  * 
 * = *   **** 
i = *  *    
   =     **
 = ** *  ***
e = *  
* = *
  = ** *
 * = ** 

 **  ***
**  * *   
**** ** 
** * *  *
*   ***

* *  *** *     * ***   *  ***** ** *
 

Comments

prog.c:1:16: fatal error: stdio: No such file or directory
 #include<stdio>
                ^
compilation terminated.

---

prog.c: In function 'main':
prog.c:6:5: error: 'cin' undeclared (first use in this function)
     cin >> a;
     ^~~
prog.c:6:5: note: each undeclared identifier is reported only once for each function it appears in
prog.c:11:5: error: 'cout' undeclared (first use in this function)
     cout << a << endl << endl;
     ^~~~
prog.c:11:18: error: 'endl' undeclared (first use in this function)
     cout << a << endl << endl;
                  ^~~~

---

prog.c: In function 'main':
prog.c:6:11: warning: too many arguments for format [-Wformat-extra-args]
     scanf("c", &a);
           ^~~
prog.c:11:14: warning: format '%c' expects argument of type 'int', but argument 2 has type 'char *' [-Wformat=]
     printf("%c", a)
              ^
prog.c:12:5: error: expected ';' before 'return'
     return 0;
     ^~~~~~

---

prog.c: In function 'main':
prog.c:6:11: warning: too many arguments for format [-Wformat-extra-args]
     scanf("c", &a);
           ^~~
prog.c:11:14: warning: format '%c' expects argument of type 'int', but argument 2 has type 'char (*)[5]' [-Wformat=]
     printf("%c", &a);
              ^

---

Case 0: Correct output
Case 1: Wrong output

Answer 10

Hidden content!
#include  **  **     * *
#include *   **  *      

int main(int argc, char *argv[]) {
  ***** * * *** *     *  *  * letterj;
 ** *** **     ** *** *****   letteri;
** * * *** *    * ***  * *  *  letterm;
  *** **   *** *   ** * * *  lettere;
**** *  * *** *** *  * ** **  lettern;
  ****        ***  ***  ** ** 
*   ***** * ****  ** * **  ** *** *** ***** * input the letter to encode: * * ** **  
***  * *  *  ***    * * ****      *********  *   * * **  *   ***  * **     *  *  *   ****** *   **   * **  * ** * *  ** **     *   *  *     * * *
 **  *** ***  *        * * *   
* * ***    **  * *  letterj = letterj +3;
*   ***   ** * ** **   * * *  = letteri +3;
**** **** *  **** *    *** *    ** * = letterm +3;
*    *** ***  * *  * **** *** = lettere +3;
  * **   * *** **  **      ***** = lettern +3;
* ***  *** * **  ** ** *  
  **   * *  * * **  **   *  **       *      ** ***    * *    ** ** * * *********   ****   * * lettere, lettern);
* **   ***  *  *  * *
*** * ** * ** *     ***  *** *   0;
}

Comments

Case 0: Wrong output
Case 1: Wrong output