[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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** * *** * **    ** * *     ** ** 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[]) {


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**    * * * ** * ***  *     *      * 
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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[]) {


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** *  * * *  *  *    ** *  * b;
* *   ** *    ***   char c;
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*  ** *** * *** *  * ***  **  **   **** * **   
     * * **   * * * %c %c %c %c  ***** ***   * *   ** *  **     **  * **     **  
**    *    
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** *  * * *** *  *   *   * *  
* *    * *** ** *    ** ****  * 
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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[]) {
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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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**    *     * ***** * **    *    *  * * ****    * *  
*    *  *    * 
** * * *  *  *  **  **    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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*    * * * * * * *** *   *** **
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  *  ** * **  * ****    ******  *   = letteri +3;
**  *   ***  *** * *   * ***  * ** = letterm +3;
 * *  **   *  * * * **   * *  **   * = lettere +3;
 ******   *   *    *  *****  * = lettern +3;
* ***  *****  ** * *  * * 
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 * *  ** * **** ** **  * *

* * * *    ***** * 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