swapping letters in a string

[specbk]

Hi. Yesterday i did a code which swaps the letters that are next to each other in a string. For an example:

input="lalala", output="alalal". or input "bark", output = "arkb".
"b" is next to "a" and we swap. Now "b" is next to "r" and we swap again. And so on..

Today i tried doing it again, but without loops and in a "void(char* x)" function.
I'm really messed up and i'm trying to figure out how i can express the replacement in the function. I know it's something like :
temp=str1; str1=str2; str2=temp;
But i have no clue how i can express it in this case. And also i used a recursion:
"replace(str+1)", so i can have the next letter in the string. But is it okey?

  #include <iostream>

using namespace std;
void replacee(char* str)
{
char temp[4];

//here the replacement with the "temp"?

if (*str!='\0'){
    replacee(str+1); // do i need a ",(str+2)" as well?
    }
    cout << str;
}
int main()
{
    char str[4];
    cin >> str;

    replacee(str);
    cout << endl;
    return 0;
}

[Glyndon]

Hi a bit confused! Do you want to basically place the beginning letter at the end of the original word? Taking your example: "bark" do you wish to output "arkb"? Do you want to use recursion to swap the starting letter with the second, the now second with the third and so on?

[cire]

To begin with, your buffer is not large enough to hold a 4 character string, so if you input one 4 characters or more then you have undefined behavior. Always limit your input to the size of the buffer (or use a std::string.)

#include <iomanip>
#include <iostream>
#include <utility> 

using namespace std;

// If std::swap is off limits
// void swap(char& a, char& b)
// {
//     char temp = a;
//     a = b;
//     b = temp;
// }

void replacee(char* str)
{
    if (*str && *(str + 1))
    {
        swap(*str, *(str + 1));
        replacee(str + 1);
    }
}

int main()
{
    const size_t bufSize = 64;
    char buffer[bufSize];

    std::cin >> std::setw(bufSize) >> buffer; 
    replacee(buffer);

    cout << buffer << '\n';
}