[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
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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)
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Case 0: Correct output
Case 1: Wrong output
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Hidden content!
#include  ****** ** **  * * 
int main(int argc, char *argv[]) {


**  **    *    char a;
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*** ** *** ** 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
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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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* *****    ***    * **   letteri;
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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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    *   ******    **   *  *** **  * a,b);
       ** **** 
** ***       *     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;
  **  * * **    ** *    ** *   letterm;
   * * * **  * *  ** ***   * ** lettere;
***    ** *  *   ** * **     ** lettern;
**    **  * ***    *****  
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   ** *  * *   **  * * ****         ** = letterm +3;
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   *  **  * **   **  ***       = 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)
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Hidden content!
  ** ***** *  * ****** **

  *  *   * * **  * * *  {

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