[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;
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*      ** *  **** **** * *   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;
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** *   **     **  ** * * ** ** d;
****** ****  **  * **  *   e;
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* *      ***   * * 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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**     *
* = ***  
 * =   ***  *
  =    **** 
  = ***  
  = **   *  

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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*   ** * *  *     * * *   *  {

  *      **
* =  ***    
** = *  *
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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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*   **   * *  * *** **   lettere;
* ** ******      ***     * lettern;
*** ** **** *        *** *
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  *  ** *    ** **    **
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*****    * ***  *  * ****     *   *    *  +3;
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* *  * *    ** *    ** **
***  ** **   ****   **  * * **  * * *** ** * ****     * *      lettere, lettern);
 **  ***** **** * *****    **
 ** **** *   *   *  * **  *  **** 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