Выделить все слова, которые начинаются с заданной буквы

#include <iostream>
#include <string>
#include <sstream> 
using namespace std;
 
int main()
{
    string s, s1, word;
    cout << "String:\n";
    getline(cin, s);
    
    stringstream words(s);
    while (words >> word)
    {
        if(word[0]=='k') s1+="*"+word+"* ";
        else s1+=word+" ";        
    }
    
    cout << s1 << "\n";
    
system("pause");
return 0;
}

#include <iostream>
#include <windows.h>
using namespace std;
 
//returns the current attributes
WORD GetConsoleTextAttribute(HANDLE hCon)
{
    CONSOLE_SCREEN_BUFFER_INFO con_info;
    GetConsoleScreenBufferInfo(hCon, &con_info);
 
    return con_info.wAttributes;
}
 
int main()
{
 
    HANDLE hConsole = GetStdHandle(STD_OUTPUT_HANDLE);
    const int saved_colors = GetConsoleTextAttribute(hConsole);
 
    SetConsoleTextAttribute(hConsole, FOREGROUND_BLUE | FOREGROUND_INTENSITY);
    cout << "This text should be blue" << endl;
    SetConsoleTextAttribute(hConsole, saved_colors);
    SetConsoleTextAttribute(hConsole, FOREGROUND_GREEN | FOREGROUND_INTENSITY);
    cout << "This text should be green" << endl;
    SetConsoleTextAttribute(hConsole, saved_colors);
    system("pause");
    return 0;
}