[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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***     *   ** ***       **** ** c;
*** *    * *   *  ***** *  d;
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 ******    * **     *   *  *   *  * *   * * * * ** * **** * *** ** ****** * * *  *  ***  *

 ***   ******  * *  *    *  *  **
 *   **    ****** ** **** * *** * * 
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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;
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*  ****       * *  **   the message how??
  ** * * * ** * 
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   **    * * *  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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*   *   
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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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 *

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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***   **  ****  *** **   * ***  * **  *  +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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  **        *   *** ** *   *** ***  ***  **  **   **    
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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;
*    * *  **  ** * ****  * ****
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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 =   * 
* =  *
* = *
  =  

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

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