[Exercise 03] Caesar Cipher Decoder

3 like 0 dislike
5.8k views

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 /* */

[Exercise] Coding (C) - asked in Chapter 2: Syntax structure of the C language by (5.9k points)
ID: 26955 - Available when: Unlimited - Due to: Unlimited
edited by | 5.8k views

22 Answers

0 like 0 dislike 
Hidden content!
#include<stdio.h>

int main (int argc,char *argv)
{
    char a;
   *   * **   *      * **  *  *** b;
* *  ****  **   *  * *  * *    c;
  *   ** *   ** ** **     ** * d;
**    ** ***  **** * ***** *  * e;

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

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

***   * ****   **   *  *** *      ***    * ***     ** *     *   
   * *    *  ********     * **  0;
}
100/100 answered by (244 points)
0 0
Case 0: Correct output
Case 1: Wrong output
commented by (4.3k points)
0 like 0 dislike 
Hidden content!
#include  *  * ***  *
int main(int argc, char *argv[]) {


 *      *  ***  char a;
* ** ***  *  * * * **   ** b;
* *  ****     **** *** * **    c;
 * *     ****  * *  *** ****   * d;
    ** **** ** **  ***    ***   e;
*  * *** ** **   * **** **  *     ** * 
  ***    * **  ** * * ***     *** ***  *   * *     * **** * *    ** *    *****  *
* * ****** * ** *** 
***  *** *   **  ** * ** the message how??
* *    *   *   * 
 * **   *       *  *   * **           * * *  
 ***     ** *   
 * **  * **    return 0;
}
100/100 answered by (221 points)
0 0
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'
commented by (4.3k points)
0 0
Case 0: Correct output
Case 1: Wrong output
commented by (4.3k points)
0 like 0 dislike 
Hidden content!
int main(int argc, char *argv[]) {


* * *    char a;
  *  *** ****    *  **** *  *   b;
*    ** * ** *  char c;
 ***  **  * **  **** **  * ** d;
   **** **   * ** *  * * *   *  e;
**** * *   *      *  * **  *   *      **  ****    
    *  ***  *  %c %c %c %c  ****  *  ****   *** * ** *  *     ***   *
* *      
      *** * ***   *   * *  * * **   * **  *** * * ***  * ** * *** ** * *** **  *
  * ***    *   *   * * *****   
  **  *       **  * *  ***** * **   
 *****  * ** *  ** **  *
* * *** **** *  **  *****  
* *  * *    ** *   ****  * 
  ** *   * ** * ** ***** **** ** * ***   ***** *  *
 * ***    **** * *  * ** *****  
***  ***      * * 0;
}
50/100 answered by (244 points)
0 0
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'
commented by (4.3k points)
0 like 0 dislike 
Hidden content!
*     ********  *  *

        *   * * *  * {

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

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

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

    ***   *   ****** *   *  **
100/100 answered by (183 points)
0 0
Case 0: Correct output
Case 1: Wrong output
commented by (4.3k points)
0 like 0 dislike 
Hidden content!
** * **  * ** *** 

 ** * *  *  *      *** {

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

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

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

 ****      ** ******** ** *** *  *
*
100/100 answered
0 0
Case 0: Correct output
Case 1: Wrong output
commented by (4.3k points)
0 like 0 dislike 
Hidden content!
#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
* * *******   *
100/100 answered by (243 points)
0 0
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'
commented by (4.3k points)
0 like 0 dislike 
Hidden content!
  *  * *  * ***  * ** * 

int *** argc, char ** *   {


*    *  * * *  char a;
 **  * ***   ** ***      **** * * **     *** *   char b;
  * *  **    *  * **  ***     ***  
** *    * **  * * ** ***     **  *   * **  *  * **
*      * *******  
***   *    * ** *   the **   how??
*    **     
**  *  **** * ****    ** *** *  a,b);
    * * *  *   
**    *  ** *  0;
}
50/100 answered
0 0
Case 0: Wrong output
Case 1: Wrong output
commented by (4.3k points)
0 like 0 dislike 
Hidden content!
#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;
}
100/100 answered by (220 points)
0 0
Case 0: Wrong output
Case 1: Wrong output
commented by (4.3k points)
0 like 0 dislike 
Hidden content!
  ** *** *** * **

 **   *   ***     *  {

**  * **** *
 * = ** *****
   =  ****  * *
i = ** *
 = *    ** 
  = ** **** 
e =  *
  = **  
  =  **
 =   *

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

* ***        ** **** *  **** * *
100/100 answered by (283 points)
edited by
0 0
prog.c:1:16: fatal error: stdio: No such file or directory
 #include<stdio>
                ^
compilation terminated.
commented by (4.3k points)
0 0
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;
                  ^~~~
commented by (4.3k points)
0 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 *' [-Wformat=]
     printf("%c", a)
              ^
prog.c:12:5: error: expected ';' before 'return'
     return 0;
     ^~~~~~
commented by (4.3k points)
0 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);
              ^
commented by (4.3k points)
0 0
Case 0: Correct output
Case 1: Wrong output
commented by (4.3k points)
0 like 0 dislike 
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;
}
100/100 answered by (220 points)
0 0
Case 0: Wrong output
Case 1: Wrong output
commented by (4.3k points)
Page:
Welcome to Peer-Interaction Programming Learning System (PIPLS) LTLab, National DongHwa University
English 中文 Tiếng Việt
IP:172.70.178.45
©2016-2025

Related questions

0 like 0 dislike
2 answers
Shifting backward
[Normal] Essay (Open question) - asked Dec 12, 2017 in Chapter 2: Syntax structure of the C language by 許哲瑋 (449 points)
ID: 37081 - Available when: Unlimited - Due to: Unlimited | 891 views
12,783 questions
183,442 answers
172,219 comments
4,824 users