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  1. #include <stdio.h>
  2. #include <string.h>
  3.  
  4. void encode(char* input, char* output, char* matrix)
  5. {
  6.     while(*input)
  7.     {
  8.         size_t idx = strchr(matrix, *input++) - matrix;
  9.         *output++ = '1' + idx / 6;
  10.         *output++ = '1' + idx % 6;
  11.     }
  12.     *output = 0;
  13. }
  14.  
  15. int main(void) {
  16.     char matrix[]="ABCDEFGHIJKLMNOPRSTUVYZWX123456789?!-+* ";
  17.     char input[50];
  18.  
  19.     printf("please enter an input");
  20.     fgets(input, 50, stdin);
  21.     *strchr(input, '\n') = '\0';
  22.  
  23.     size_t len = strlen(input);
  24.     char output[2*len +1];
  25.  
  26.     encode(input, output, matrix);
  27.     printf("\nEncoded String: %s\n", output);
  28.     return 0;
  29. }
Success #stdin #stdout 0s 4944KB
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stdin
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HELLO 1234
stdout
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please enter an input
Encoded String: 22152626337452535455
https://ideone.com/kJXbtL
language:
C (gcc 8.3)
created:
4 years ago
visibility:
public

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