C++ Program to Find Initials of a Name

Given a string name, we have to find the initials of the name 

Examples: 

Input: Kamlesh Joshi
Output: K J
We take the first letter of all
words and print in capital letter.

Input: Jude Law
Output: J L

Input: Abhishek Kumar Bisht
Output: A K B

1) Print first character in capital. 
2) Traverse rest of the string and print every character after space in capital letter.

Output: 

K J

Time Complexity: O(n), Here n is the length of the string.
Auxiliary Space: O(1), As constant extra space is used.

Another possible solution is given as follows:

Output: 

K J

Time complexity: O(w), The complexity of this code will be less than O(w) where w is number of words in sentence, which can be little better than number of characters in String. 
We can also use strtok() function in C/C++ to achieve this. 

Auxiliary space: O(1).