[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
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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'
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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;
 *   * *  ** * *   * *  * ** d;
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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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}


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)
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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)
0 like 0 dislike 
Hidden content!
#include  *** ** *  ** *

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

*   **  * ** * ** *    * {

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