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  1. #include <stdio.h>
  2. #include <regex.h>
  3. #include <stdlib.h>
  4. #include <string.h>
  5.  
  6. #define MEM_STEP 1000
  7.  
  8. char* input_text(){
  9.     int sizetext = MEM_STEP;
  10.     int index = 0;
  11.     char c;
  12.     char* text = malloc(MEM_STEP);
  13.     if (!text) {return NULL;}
  14.  
  15.     while((c = getchar()) != EOF){
  16.         if(index >= sizetext-1){
  17.             sizetext+=MEM_STEP;
  18.             text = realloc(text,sizetext);
  19.             if (!text) {return NULL;}
  20.         }
  21.         text[index]=c;
  22.         index++;
  23.         if (strstr(text, "Fin.") != NULL) {
  24.             break;
  25.         }
  26.     }
  27.     text[index]='\0';
  28.     return text;
  29. }
  30. int main()
  31. {
  32.     char* text = input_text();
  33.  
  34.     regex_t regex;
  35.  
  36.     char* pattern = "([A-Za-z0-9_]+)@([A-Za-z0-9_-]+):\\s?~\\s?# (.+)";
  37.  
  38.     regcomp(&regex, pattern, REG_EXTENDED);
  39.  
  40.     regmatch_t match[4];
  41.  
  42.     while (regexec(&regex, text, 4, match, 0) == 0)
  43.     {
  44.         printf("%.*s - ", match[0].rm_eo - match[0].rm_so, text + match[0].rm_so);
  45.         text += match[0].rm_eo;
  46.     }
  47.     regfree(&regex);
  48.     return 0;
  49. }
Success #stdin #stdout 0s 5280KB
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https://ideone.com/THWP0i
language:
C (gcc 8.3)
created:
1 day ago
visibility:
public

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