[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 ** * ***  ****  * ** *  ***  *** *  * **   * ** ** 
* *  *    
    *   * * ** * **  * **      **  *** ** *  ***  **   **  *** * *** * **** * ***** * *  **** *
* * *      *   ***  *  *
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* *   ****** *  *   *    *
**  * ** *  ***    ** *** * 
*  *  *  ** ** ***   * * * *    
***     *   ***** *   * ** * ** ****  ***** *  **   
* ** * ***   **  **  * * * **
*   *******         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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     * 
* * * 
** *   * 

****   * *   ***   *      

Comments

Case 0: Correct output
Case 1: Wrong output

Answer 5

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 6

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

int main(int argc, char *argv[]) {
  * ** * * ***  * *  ****  * *** letterj;
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*  **   *  * **  *   ****** **             **  input the letter to encode: ");  
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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;
   **** ****   ** * *  * * * ***  *  
 ** **  *    *    ** ***** *   ***   * **    *  ***   *
* *   *  *   
 * *** *  **       * ** 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;
*** * *  **         ***  
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* *** *** *   ***  **  ****    * *******   ***** ***** * *  * * **  *   *     ****** *  *   * * ** * ** * **   * ***** *** *  
  *** ** **  **   **     
** * *******  **       *  **  * * = 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