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  1. #include <stdio.h>
  2. #include <string.h>
  3.  
  4. int main() {
  5.     char input[101];
  6.     int vowelCount[5] = {0};
  7.     char vowels[5] = {'a', 'e', 'i', 'o', 'u'};
  8.  
  9.     do {
  10.         printf("Enter a string (1 to 99 characters): ");
  11.         scanf("%100s", input);
  12.     } while(strlen(input) == 0 || strlen(input) >= 100);
  13.  
  14.     for (int i = 0; input[i] != '\0'; i++) {
  15.         switch(input[i]) {
  16.             case 'a': case 'A':
  17.                 vowelCount[0]++;
  18.                 break;
  19.             case 'e': case 'E':
  20.                 vowelCount[1]++;
  21.                 break;
  22.             case 'i': case 'I':
  23.                 vowelCount[2]++;
  24.                 break;
  25.             case 'o': case 'O':
  26.                 vowelCount[3]++;
  27.                 break;
  28.             case 'u': case 'U':
  29.                 vowelCount[4]++;
  30.                 break;
  31.         }
  32.     }
  33.  
  34.     printf("Original counts:\n");
  35.     for (int i = 0; i < 5; i++) {
  36.         printf("Vowel '%c' : %d\n", vowels[i], vowelCount[i]);
  37.     }
  38.  
  39.     int i = 0;
  40.     while (i < 4) {
  41.         if (vowelCount[i] < vowelCount[i + 1]) {
  42.             int temp = vowelCount[i];
  43.             vowelCount[i] = vowelCount[i + 1];
  44.             vowelCount[i + 1] = temp;
  45.  
  46.             char tempChar = vowels[i];
  47.             vowels[i] = vowels[i + 1];
  48.             vowels[i + 1] = tempChar;
  49.  
  50.             i = 0;
  51.         } else {
  52.             i++;
  53.         }
  54.     }
  55.  
  56.     printf("Sorted:\n");
  57.     for (int i = 0; i < 5; i++) {
  58.         printf("%c: %d\n", vowels[i], vowelCount[i]);
  59.     }
  60.  
  61.     return 0;
  62. }
  63.  
Success #stdin #stdout 0.01s 5288KB
comments (?)
stdin 
oiuaeaeoiuaaoooiiiieeeeuuuuuu
stdout 
Enter a string (1 to 99 characters): Original counts:
Vowel 'a' : 4
Vowel 'e' : 6
Vowel 'i' : 6
Vowel 'o' : 5
Vowel 'u' : 8
Sorted:
u: 8
e: 6
i: 6
o: 5
a: 4
https://ideone.com/WfRYkX
language:
C (clang 8.0)
created:
8 days ago
visibility:
public

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