[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