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  1. /*
  2.  *  simpleEncode.c
  3.  *
  4.  *  reads in a permutation of the alphabet then encodes
  5.  *  lower case letters using that permutation
  6.  *  module 4 template code you asked for - might need some cleaning up...
  7. *
  8.  *  Created by Julian Saknussemm on 11/09/1752
  9.  *  Licensed under Creative Commons BY 3.0.
  10.  *
  11.  */
  12.  
  13. #include <stdio.h>
  14. #include <stdlib.h>
  15. #include <assert.h>
  16.  
  17. #define STOP -1
  18. #define ALPHABET_SIZE 26
  19.  
  20. char encode (int plainChar, char *permuation);
  21. void testEncode (void);
  22.  
  23. int main (int argc, char *argv[]) {
  24.  
  25.    testEncode();
  26.  
  27.    //char permutation[ALPHABET_SIZE];
  28.    //
  29.    //scanf ("%s", permutation);
  30.    //
  31.    //// getchar() reads and returns one character from the keyboard
  32.    //// returns -1 when the input is finished / end-of-file is reached
  33.    //// signal this from the kayboard by pressing ^D in linux/^Z windows
  34.    //int plainCharacter = getchar();
  35.    //while (plainCharacter != STOP) {
  36.    //   int encodedCharacter = encode (plainCharacter, permutation);
  37.    //   printf ("%c", encodedCharacter);
  38.    //   plainCharacter = getchar();
  39.    //}
  40.    return EXIT_SUCCESS;
  41. }
  42.  
  43. void testEncode (void) {
  44.    assert (encode ('A',"abcdefghijklmnopqrstuvwxyz") == 'A');
  45.    assert (encode ('?',"abcdefghijklmnopqrstuvwxyz") == '?');
  46.    assert (encode (' ',"abcdefghijklmnopqrstuvwxyz") == ' ');
  47.    assert (encode ('\n',"abcdefghijklmnopqrstuvwxyz") == '\n');
  48.  
  49.    assert (encode ('a',"abcdefghijklmnopqrstuvwxyz") == 'a');
  50.    assert (encode ('m',"abcdefghijklmnopqrstuvwxyz") == 'm');
  51.    assert (encode ('z',"abcdefghijklmnopqrstuvwxyz") == 'z');
  52.  
  53.    assert (encode ('a',"bcdefghijklmnopqrstuvwxyza") == 'b');
  54.    assert (encode ('m',"bcdefghijklmnopqrstuvwxyza") == 'n');
  55.    assert (encode ('z',"bcdefghijklmnopqrstuvwxyza") == 'a');
  56.  
  57.    assert (encode ('a',"qwertyuiopasdfghjklzxcvbnm") == 'q');
  58.    assert (encode ('b',"qwertyuiopasdfghjklzxcvbnm") == 'w');
  59.    assert (encode ('z',"qwertyuiopasdfghjklzxcvbnm") == 'm');
  60. }
  61.  
  62. char encode (int plainChar, char *permuation) {
  63. 	// Initialization 
  64. 	char returnValue;
  65. 	// Is an alphabetical character 
  66. 	if('a' <= plainChar && plainChar <= 'z') {
  67. 		returnValue = &permutation + sizeof(int)*('a'+plainChar); 
  68. 	} else if ('A' <= plainChar && plainChar <= 'Z'){		
  69. 		returnValue = &permutation + sizeof(int)*('A'+plainChar); 
  70. 	}
  71.  
  72. 	return returnValue; 
  73. }
Compilation error #stdin compilation error #stdout 0s 0KB
comments (?)
stdin
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Standard input is empty
compilation info 
prog.c: In function ‘encode’:
prog.c:67:18: error: ‘permutation’ undeclared (first use in this function)
   returnValue = &permutation + sizeof(int)*('a'+plainChar);
                  ^~~~~~~~~~~
prog.c:67:18: note: each undeclared identifier is reported only once for each function it appears in
stdout
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Standard output is empty
https://ideone.com/LidEO1
language:
C (gcc 8.3)
created:
7 years ago
visibility:
public

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