[Exercise 03] Caesar Cipher Decoder

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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 | 3.6k views

22 Answers

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Hidden content!
#include<stdio.h>

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


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}
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)
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Case 1: Wrong output
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Hidden content!
int main(int argc, char *argv[]) {


  ***       char a;
   *****   ** ** *   **   * b;
   *  * ***  **  char c;
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     * *  * ** * * 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)
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Hidden content!
**** **  *      * **

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

** *  *** *             {

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

int main(int argc, char *argv[]) {
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*  ** * *****    **  * ** *     0;
}


INPUT
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 **   *   * * *
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)
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Hidden content!
**  *  *     *   *

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


*   ****  *    char a;
**   ** * ** *   * *  * *     ***** *     char b;
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*         * **     
        * *  *  0;
}
50/100 answered
0 0
Case 0: Wrong output
Case 1: Wrong output
commented by (4.3k points)
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Hidden content!
#include  ****   * * * * 

int main(int argc, char *argv[])
{
    ** *  *  **   * letterj;
** *  * **  *   ***  *    *  letteri;
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* *  **  *  **  * * *  **  ***  ** = letteri +3;
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**          ***  * ***   * * ** * * = lettere +3;
*** *** *** ** *  * ** ** * ** **   = lettern +3;
* * ** * * **   ********
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* *   ** **  ***   **** 

 *  **     * * *   * 0;
}
100/100 answered by (220 points)
0 0
Case 0: Wrong output
Case 1: Wrong output
commented by (4.3k points)
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Hidden content!
  **     **** **  *  * 

  *        *   {

** ** **
 * = ***  
  =  ****
i =  ****
* =  *  *  
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** =    
*  = *

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*** *** *
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 ** *   

 *    **    *  ** * ****** *  *
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)
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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)
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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
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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)
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Case 0: Wrong output
Case 1: Wrong output
commented by (4.3k points)
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