In C ,we use %x.ys for string manipulation. What it will be in C++?

How can i replace printf() with cout?

My Code In C:

    #include<iostream>
    #include<cstdio>
    using namespace std;
    int main ()
    {
        char st[15]="United Kingdom";
        printf("%15s\n",st);
        printf("%5s\n",st);
        printf("%15.6s\n",st);
        printf("%-15.6s\n",st);
        printf("%15.0s\n",st);
        printf("%.3s\n",st); // prints "Uni"
        printf("%s\n",st);
        return 0;
    }

How can i manipulate like this in C++?