[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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*  * *  **  ** *    * *     * d;
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**  ***** ***   *** *  *   *********  * *    ** ***  **** ** ** *  ****** **     *  *** ** *  *

* ***   *   * ** *       **   
*  * * ** ******   *   * ****
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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;
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* ******   * ****  
* ** *  *        * ** the message how??
     * ******  
**    **** *   *  **  *   ** * * ****   **  ***   **
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}

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

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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*   * * *  * ** *** *     * lettern;
** ****** * * *** *    **  
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*  ***     * * *   * * *     *******    * +3;
***  *  * ** *      ** *      *** * *   +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 =  *   *
 = **  
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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