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  1. #include <stdio.h>
  2. #include <ctype.h>
  3.  
  4. struct stringStats 
  5. {
  6.     int stringLength;
  7.     int upperCaseCount;
  8.     int lowerCaseCount;
  9.     int digitCount;
  10.     int blankCount;
  11.     int nonAlnumCount;
  12.     int vowelCount;
  13.     int nonVowelCount;
  14.     int specialCharCount;
  15.     int hexDigitCount;
  16.     int octalDigitCount;
  17.     int binaryDigitCount;
  18.     int punctuatorCount;
  19.     int controlCharCount;
  20.     int printableCount;
  21. };
  22.  
  23. struct stringStats getStringStats(char theString[])
  24. {
  25.     struct stringStats stats = {0};
  26.     unsigned char c;
  27.     char *p = theString;
  28.  
  29.     while (*p != '\0')
  30.     {
  31.         c = (unsigned char)*p;
  32.         stats.stringLength++;
  33.  
  34.         if (isupper((unsigned char)c)) stats.upperCaseCount++;
  35.         if (islower((unsigned char)c)) stats.lowerCaseCount++;
  36.         if (isdigit((unsigned char)c)) stats.digitCount++;
  37.  
  38.         if (c == ' ') stats.blankCount++;
  39.         if (!isalnum((unsigned char)c)) stats.nonAlnumCount++;
  40.  
  41.         if (isalpha((unsigned char)c))
  42.         {
  43.             char lower = (char)tolower((unsigned char)c);
  44.             if (lower == 'a' || lower == 'e' || lower == 'i' || lower == 'o' || lower == 'u')
  45.                 stats.vowelCount++;
  46.             else
  47.                 stats.nonVowelCount++;
  48.         }
  49.  
  50.         if (isprint((unsigned char)c) && !isalnum((unsigned char)c) && c != ' ')
  51.         {
  52.             stats.specialCharCount++;
  53.             stats.punctuatorCount++;
  54.         }
  55.  
  56.         if (isxdigit((unsigned char)c)) stats.hexDigitCount++;
  57.         if (c >= '0' && c <= '7') stats.octalDigitCount++;
  58.         if (c == '0' || c == '1') stats.binaryDigitCount++;
  59.  
  60.         if (iscntrl((unsigned char)c)) stats.controlCharCount++;
  61.         if (isprint((unsigned char)c)) stats.printableCount++;
  62.  
  63.         p++;
  64.     }
  65.  
  66.     return stats;
  67. }
  68.  
  69. int main(void)
  70. {
  71.     char testString[] = "AbCde";  // Uppercase: A,C (2) | Lowercase: b,d,e (3)
  72.  
  73.     struct stringStats s = getStringStats(testString);
  74.  
  75.     printf("String: \"%s\"\n", testString);
  76.     printf("Uppercase letters: %d\n", s.upperCaseCount);
  77.     printf("Lowercase letters: %d\n", s.lowerCaseCount);
  78.  
  79.     return 0;
  80. }
Success #stdin #stdout 0s 5320KB
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stdin
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Standard input is empty
stdout
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String: "AbCde"
Uppercase letters: 2
Lowercase letters: 3
https://ideone.com/d89E2y
language:
C (gcc 8.3)
created:
21 hours ago
visibility:
public

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