[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