[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 | 6.7k views

22 Answers

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Hidden content!
#include<stdio.h>

int main (int argc,char *argv)
{
    char a;
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  ******  * *  * * ******* **  ***** *  *** ***  ***
  **  * ******    ** *  * *  *  0;
}
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'
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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
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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
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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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**  **  * * *  ** * * *    **     ** 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;
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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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** =  *  * 
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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
commented by (4.3k points)
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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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