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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3. #include <string.h>
  4.  
  5.  
  6. const int MAX_FILE_NAME = 254;
  7.  
  8.  
  9. const char *sys_file_name_from_usr_file_name(char *usr_file_name)
  10. {
  11. 	for(char * ptr = usr_file_name; *ptr != '\0'; ++ptr) {
  12. 		if ( *ptr == ' ' ) {
  13. 			*ptr = '_';
  14. 		}
  15. 	}
  16.  
  17. 	return usr_file_name;
  18. }
  19.  
  20. const char *usr_file_name_from_sys_file_name(char *sys_file_name)
  21. {
  22. 	for(char * ptr = sys_file_name; *ptr != '\0'; ++ptr) {
  23. 		if ( *ptr == '_' ) {
  24. 			*ptr = ' ';
  25. 		}
  26. 	}
  27.  
  28. 	return sys_file_name;
  29. }
  30.  
  31. int main(void)
  32. {
  33. 	char file_name[MAX_FILE_NAME];
  34.  
  35. 	printf( "Give me a file name: " );
  36. 	fgets( file_name, MAX_FILE_NAME, stdin );
  37.  
  38. 	printf( "\nSys file name: %s", sys_file_name_from_usr_file_name( file_name ) );
  39. 	printf( "\nUser file name: %s",
  40. 				usr_file_name_from_sys_file_name(
  41. 					sys_file_name_from_usr_file_name( file_name ) ) );
  42. 	return EXIT_SUCCESS;
  43. }
  44.  
Success #stdin #stdout 0s 5284KB
comments (?)
stdin
copy 
mi nombre de archivo.txt
stdout
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Give me a file name: 
Sys file name: mi_nombre_de_archivo.txt
User file name: mi nombre de archivo.txt
https://ideone.com/RtYHJM
Substituting spaces for underscores.
language:
C (gcc 8.3)
created:
102 days ago
visibility:
secret

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