C++ limit line size to N characters in .txt file

Question

Would be so happy if somebody helped me with this task: I have a .txt file, the program should ask a user for a number N (10<=n<=100) amount of characters per line. That means that every line in the .txt file can have not more than N characters, but words and symbols should be logically split. Example:

Hello World, It’s (me) again!
 -> n=7 -> 
Hello 
World,
It’s 
(me) 
again!

So where am I now:

#include <fstream>
#include <iostream>
using namespace std;
int main() {
    int ok;       // ability to continue
do
{
    int n;
    cout<< "Enter n:"<<endl;    //ask a number from user
    cin>> n;
    while(n<10 || n>100)        //set a number limit
    {                           //if n not in the limit
    cout<< "Enter n:"<<endl;    //ask again
    cin>> n;
    }
    fstream f;                   //local file name in program
    char c;                      //will read file by symbol
    f.open("text.txt", ios::in); //open file
    while (f) {
   for (int i = 1; f >> c; i ++) {    //here should be the conditions to add line break
    cout << c;                        //after N characters
    if (i > n) {                      //but should not wrap words
        cout << "\n";
        i = 0;                        //here it starts counting from 0 after \n
    }}
    };
    f.close();
   cout << "\n\n Continue (1) End (0)?" << endl;
cin >> ok;
cin.ignore();
}
while (ok==1);
}

As I understand the logic, it should count the file by character, and if character index==7, it should cout ‘\n’. But I have problems with implementing this idea in code.

All this code does - removes all spaces and wraps words.