Write a function that takes a string as input and reverse only the vowels of a string.
Example 1:
Given s = "hello", return "holle".
Given s = "hello", return "holle".
Approach: The idea is to traverse the string from both ends while skipping the non-vowels characters from both ends.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 | char* reverseVowels(char* s) { int low = 0, high = strlen(s) - 1; char c; while(low < high){ //move forward to skip consonant while(low < strlen(s) && tolower(s[low]) != 'a' && tolower(s[low]) != 'e' && tolower(s[low]) != 'i' && tolower(s[low]) != 'o' && tolower(s[low]) != 'u'){ low++; } //move backward to skip consonant while(low < high && tolower(s[high]) != 'a' && tolower(s[high]) != 'e' && tolower(s[high]) != 'i' && tolower(s[high]) != 'o' && tolower(s[high]) != 'u'){ high--; } if(low < high){ c = s[low]; s[low] = s[high]; s[high] = c; low++; high--; } } return s; } |
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