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  1. #include <stdio.h>
  2. int main()
  3. {
  4.     char c_to_search[5] = "asdf";
  5.  
  6.     char text[68] = "hello my name is \0 there is some other string behind it \n\0 asdf";
  7.  
  8.     int pos_search = 0;
  9.     int pos_text = 0;
  10.     int len_search = 4;
  11.     int len_text = 67;
  12.     for (pos_text = 0; pos_text < len_text - len_search;++pos_text)
  13.     {
  14.         if(text[pos_text] == c_to_search[pos_search])
  15.         {
  16.             ++pos_search;
  17.             if(pos_search == len_search)
  18.             {
  19.                 // match
  20.                 printf("match from %d to %d\n",pos_text-len_search,pos_text);
  21.                 return;
  22.             }
  23.         }
  24.         else
  25.        {
  26.                pos_text -=pos_search;
  27.                pos_search = 0;
  28.        }
  29.     }
  30.     // no match
  31.     printf("no match\n");
  32.    return 0;
  33. }
Success #stdin #stdout 0.01s 1720KB
comments (?)
stdin
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Standard input is empty
stdout
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match from 58 to 62
https://ideone.com/2In3mr
language:
C (gcc 8.3)
created:
11 years ago
visibility:
public

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