[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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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'
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Case 0: Correct output
Case 1: Wrong output
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int main(int argc, char *argv[]) {


  **     char a;
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* ***       *   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
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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'
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Hidden content!
 **    * ** *    ****

int     * argc, char  **   {


     * * ****  char a;
* **** *** * *** **  **  **** ***  *    *  char b;
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**** *    ** *** 
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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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  **** *    **     **  *  * = lettern +3;
*  * *****    * **  * **  
**    * * * ** ***   * ****    *  **  ****  **  *  * ******   *** lettere, lettern);
 *** *** **** *  **  **  ** *

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

     * ** ** *   * *    ** {

*     *   
* = **   *
  = **** 
i = ** * ***
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e = **
* =   *
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*  ***
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*  ** ** *   *       ** **** ***  *
100/100 answered by (283 points)
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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)
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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)
0 0
Case 0: Wrong output
Case 1: Wrong output
commented by (4.3k points)
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