Error: Expected initializer before void

[HaxterHuz]

Hey guys today, after a long time I was coding in C++ and I got an Error:
Expected initializer before void
Can anyone help?

  #include <iostream>
#include <string>

using namespace std;

string input;
int count = 0, length

void caesarCipher (string phrase)
{
    length = (int) phrase.length()
    
    for (count = 0; count < length; count++)
    {
       if (isalpha(phrase[count])) 
       {
           phrase[count] = tolower(phrase[count]);
           for (i = 0; i < 13; i++)
           {
              if (phrase[count] == 'z') 
                  phrase[count] = 'a';
              else
                  phrase[count]++;
           }
       }
    }
    cout << "Results: " << phrase << endl;
}

int main() 
{   
    cout << "Enter your phrase: ";
    cin >> input;
    
    caesarCipher(input);
    return 0;
}

[integralfx]

int count = 0, length
Missing a semi-colon.

[TheIdeasMan]

You need a semicolon at the end of line 7.

But should avoid global variables, and always declare one variable per line of code. Delay declaration until you have a sensible value to assign to the variable.

I like to put function declarations before main, with the definitions after:

#include <iostream>
#include <string>

using namespace std;  // avoid this

string input;
int count = 0, length

void caesarCipher (std::string& phrase);

int main() 
{   

std::string input;


    std::cout << "Enter your phrase: ";
   std:: cin >> input;
    
    caesarCipher(input);
    return 0;
}

void caesarCipher (const string& phrase)
{
   std::size_t length = (int) phrase.length()

std::string OutputPhrase;
    
    for (std::size_t count = 0; count < length; count++)
    {
       if (isalpha(phrase[count])) 
       {
           OutputPhrase[count] = tolower(phrase[count]);
           for (i = 0; i < 13; i++)
           {
              if (phrase[count] == 'z') 
                  OutputPhrase[count] = 'a';
              else
                  OutputPhrase[count]++;
           }
       }
    }
    cout << "Results: " << OutputPhrase << endl;
}

I would also avoid changing the original phrase, I made a new variable and changed that instead.