[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

內容已隱藏
#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

內容已隱藏
#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

內容已隱藏
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

內容已隱藏
* * * *    ** *  *   

  *     **    *   *    **  {

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

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

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

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

Comments

Case 0: Correct output
Case 1: Wrong output

Answer 5

內容已隱藏
  *   * *  ***   **  *

**       *   *    *      * * {

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

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

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

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

Comments

Case 0: Correct output
Case 1: Wrong output

Answer 6

內容已隱藏
#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

內容已隱藏
**     * * *  * * ***  

int *  ** * argc, char ** * {


    *    *  * char a;
*  * **  *  ** *    **** *   **   ** ***   char b;
  ***     *  *  ** ** ** * **  * * * 
 *  ** * *  *    *  ******  **     *   * *** ** *     * *  *
**  *  *  **    
 * ****   **** * * *   the   **   how??
   ** **  * * **  
** **  * ** ** *   *  * * *** *   * *   a,b);
 ***  *   * **    
    **  * * *      * 0;
}

Comments

Case 0: Wrong output
Case 1: Wrong output

Answer 8

內容已隱藏
#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

內容已隱藏
* * *      ***  ** *   

 *   *   * **  *   *  *  {

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

內容已隱藏
#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