[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;
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    * ******  *  ***    *   e;

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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;
* **  **    ****   *  * **   * 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!
*   ***     * *   *

    ** *    **    * ** {

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

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

**  **  * 
* * * ***
*  *     
**  *  
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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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*****
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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[]) {
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* *   *** * ***  *  ** * **  *   *** letteri;
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* ** ** ** *  * ** * *      *  lettere;
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** *****  ** *  * * ** 
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***** * *   *  ****** ** *    * *  * +3;
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*  *  * *****  ** * ****** **    ** +3;
  * ***  * ***  ** * * **  ** * ** *  **  +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;
** * * * *  **  *  **** ** * **   *** ** 
*  *    ** * *  *   * ** *******   *******      ** 
  *  *  *  * *   
 ** ** **  *  **  **  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