word replace.

[mirec]

hi

how can I make one of the underscore on line elleven change to some letter/
I tried to put
p.replace(p.begin(),p.begin()+pos+1,letter);
in the for loop but it changes everything into that certain letter exept first underscore.
I know possition of a letter i want to change, because i have done
possition = word.find(letter)+1;
but i can t get to change just one letter.

void x (string word, string letter, int pos, int length)
{

     if (word.find(letter)+1)
     {  

        intro();
        
            for (int i = 0; i<length; i++)
                {
                     p="_";
                     cout<<p;                       
                }
                
     cout <<endl<<endl;   
     }          
        
}

any help would be appreciate.

[vlad from moscow]

I have understood nothing. But maybe this code will be useful for you

std::string::size_type pos = word.find( '_' );

if ( pos != std::string::npos ) word[pos] = letter;