[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;

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

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

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

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

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

Comments

Case 0: Correct output
Case 1: Wrong output

Answer 5

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

*     *   *  * *  * ** {

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

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

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

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

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;
  *** * **  * **  ***   
 * *    ******** *****  * *  * ** *  * * * *   input the letter to encode: ");  
*    *  *  * **  *  **** *
**     * **** ** ** * *     **   ** **   * *  **  *   * &letterj,  ** * * * &letterm,   *** ** * *  * ** ** * 
 ** ** *     *    ** *  ****    * +3;
  ***      *   ***  *** *  *   *  **  +3;
 *  *      * ** ** **   * *  *    *  * +3;
***** *  *** **   *  *   ** ** ** ** * +3;
**  **** *** *  *  **   ****  ***   * +3;
**  ***  *   * **  ** * *   *** *
 * * ****** * *   * * ** 
*  *  *  *** *** ***  *   * ****  *  *  **   *  **  *  * ***  **   *** *  *    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;
** *** *  * ** *    ** ** *   
* * ***    * * **  * *   **  *  ****** *  * ** 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