Add a block into my pattern letter in c++

I want to print a big letter (R) into a block. I've got the letter but how can I add a block ?

#include <iostream>
#include <string>
#include <cctype>


int main(){
    for( int r = 0; r < 7; ++r ){
        for(int c = 0; c<5;++c){
            if ((c == 0) || (c == 4 && (r != 0 && r != 3)) || ((r == 0 || r == 3) && (c > 0 && c < 4))){

                std::cout << "R" << "" ;
            }
            else{
                std::cout << " ";
            }
        }
        std::cout << std::endl;

    }
    return 0;
}

Expected:

Result: