c a d

#include <stdio.h>
#include <cs50.h>
#include <ctype.h>
#include <string.h>


int main(int argc, string argv[])
{

        string s = GetString();

        if (s != NULL && s != '\0')
        {
            for (int i = 0, n = strlen(s); i < n; i++) /// Loop through string.
            {
                if (s[i] == s[0])
                {
                    printf("%c", toupper (s[0])); /// Loop through index, when index first character print it.
                }
                if (s[i] == ' ') /// Loop through string, look for space, then print +1 chararacter after space.
                {
                    printf("%c", toupper (s[i+1]));
                }
            }
        }
        printf("\n");
}