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  1. #include <stdio.h>
  2. #include <string.h>
  3. #include <ctype.h>
  4.  
  5. int
  6. password_validate(const char *pass)
  7. {
  8.     int upper = 0, lower = 0, digit = 0;
  9.     if (pass == NULL || strlen(pass) == 0)
  10.         return -1;
  11.  
  12.     printf("checking password: ");
  13.     do
  14.     {
  15.     	printf("%c", *pass);
  16.         if (isupper(*pass))
  17.             upper = 1;
  18.         if (islower(*pass))
  19.             lower = 1;
  20.         if (isdigit(*pass))
  21.             digit = 1;
  22.     } while ((!lower || !upper || !digit) && *(++pass));
  23.     printf("\n");
  24.     return (*pass != '\0' ? 0 : (upper == 0 ? -2 : (lower == 0 ? -3 : -4)));
  25. }
  26.  
  27. int main(void) {
  28. 	int err;
  29. 	const char *pass = "Password";
  30. 	err = password_validate(pass);
  31. 	printf("[1][%d]\n", err);
  32.  
  33. 	pass = "Pass678word";
  34. 	err = password_validate(pass);
  35. 	printf("[2][%d]\n", err);
  36.  
  37. 	pass = "password1";
  38. 	err = password_validate(pass);
  39. 	printf("[3][%d]\n", err);
  40.  
  41. 	pass = "1password";
  42. 	err = password_validate(pass);
  43. 	printf("[4][%d]\n", err);
  44.  
  45.     pass = "Password1";
  46. 	err = password_validate(pass);
  47. 	printf("[5][%d]\n", err);
  48.  
  49. 	pass = "password1D";
  50. 	err = password_validate(pass);
  51. 	printf("[6][%d]\n", err);
  52.  
  53. 	pass = "pAssword1";
  54. 	err = password_validate(pass);
  55. 	printf("[7][%d]\n", err);
  56.  
  57. 	pass = "1Password";
  58. 	err = password_validate(pass);
  59. 	printf("[8][%d]\n", err);
  60.  
  61. 	pass = "aA1";
  62. 	err = password_validate(pass);
  63. 	printf("[9][%d]\n", err);
  64.  
  65. 	// expected to check "a" and return -2 due to no uppercase.
  66. 	// ends up checking "aa" and returns 0.
  67. 	pass = "aa";
  68. 	err = password_validate(pass);
  69. 	printf("[10][%d]\n", err); 
  70.  
  71. 	// expected to only check "hi1" and return -2
  72. 	// ends up checking "hi1N" and returns 0.
  73. 	pass = "hi1NOTINCLUDED";
  74. 	err = password_validate(pass);
  75. 	printf("[11][%d]\n", err);
  76.  
  77. 	return 0;
  78. }
  79.  
Success #stdin #stdout 0s 2112KB
comments (?)
stdin
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Standard input is empty
stdout
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checking password: Password
[1][-4]
checking password: Pass6
[2][0]
checking password: password1
[3][-2]
checking password: 1password
[4][-2]
checking password: Password1
[5][0]
checking password: password1D
[6][0]
checking password: pAssword1
[7][0]
checking password: 1Pa
[8][0]
checking password: aA1
[9][0]
checking password: aa
[10][-2]
checking password: hi1N
[11][0]
https://ideone.com/GiOGkj
language:
C (gcc 8.3)
created:
8 years ago
visibility:
public

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