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  1. #include <stdio.h>
  2. #include <string.h>
  3.  
  4. static const char*
  5. get_file_ext(const char *filename) {
  6.    const char *ext = strrchr(filename, '.');
  7.    return (ext && ext != filename) ? ext : (filename + strlen(filename));
  8. }
  9.  
  10. int main() {
  11.   char *files[] = {"a.c", ".a", "a", NULL };
  12.  
  13.   for (char** f = files; *f != NULL; ++f)
  14.     printf("ext: '%s'\n", get_file_ext(*f));
  15. }
  16.  
Success #stdin #stdout 0.01s 1720KB
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stdin
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Standard input is empty
stdout
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ext: '.c'
ext: ''
ext: ''
https://ideone.com/9kJxg
language:
C99 (gcc 8.3)
created:
12 years ago
visibility:
secret

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