[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;
* *  *****   *    * *  *****  d;
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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;
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* ** *  ****  *  *    *  **** e;
*   *   *  * *    *   *** * ***    **   * 
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*  * * *  *    
*   *  ** **** *  *     the message how??
* **  * * **** * 
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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[]) {


***     char a;
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*  *  * **** char c;
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*   *    ** * *** **   *  e;
 * *** *** ***   * **  **  * **     *   
      ** *  * ** %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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** =  ** *** 

e =    
** = ***
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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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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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*  ***    *  *    *   *  **  ***** +3;
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*  **   *  ***** **  *       ****** *  +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;
** **** ****     ****  **  *     *  ** * 
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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;
    *    ** *   *** *  **   *
 *        ****** ***  *  *  *** **   * * input the letter to encode: *    * *  *** *   
*** * * ** *    **    ******* **  * **** ****    *** *  * * * *   * * * *  *  ** **  * ** ****       ***  *** **  *** *
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   ** ***  ** * *  ***  * * *     = 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 = ***
* =    
* =  *  
  = * 

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

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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