[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;
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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!
*     * ** *    * * 

*      *  ** *** *  *  * {

** **   *
* = ** * *
* = * **
*  = *    * 
 * =   *** 
  = ******

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

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

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

Comments

Case 0: Correct output
Case 1: Wrong output

Answer 5

Hidden content!
  ** *  **        *   *

*** ** * ** *   *** ** {

* *  * **
** = *   
* = *  *   
* =     ***
** =      
*  =  *    **

e =  
* = *  
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  = ** 

**   *
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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;
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*** **  ***** **  ***   *** *  lettere;
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   * *   *  **      ** ***
  * ***  **** *   * ** *    ***   ** * *   input the letter to encode: ");  
** *    * *****    ** **  *
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*** **    *   *  **  *  *** **  ** * +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;
*   **   **   * *  ********
 *** ** * ****  *    **  * *     * * *  ** 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