найти самое большое количество пробелов

#include <stdlib.h>
#include <iostream>
#include <string>
#include <algorithm>
#include <iterator> 
 
using namespace std;
 
int spaces=0;
int spaces_max=0;
 
#define max(a,b)    (((a) > (b)) ? (a) : (b))
 
bool find_spaces(unsigned char c) 
{ 
    spaces_max=max(spaces_max,spaces); 
    if( c == ' ' ) spaces++;
    else spaces=0;
    return spaces <= 1;
}
 
void main()
{
    string output, intput = "This   manipulator may       be used to   produce a line of output immediately...";
 
    copy_if(intput.begin(), intput.end(), back_inserter(output), find_spaces);
 
    cout << "input: " << intput << endl;
    cout << "output: " << output << endl;
    cout << "max spaces in raw: " << spaces_max << endl;
 
    system("pause");
}

#include <iostream>
#include <string>
 
using namespace std;
 
int main()
{
   std::string str = "sdfnjdf djkfjsdhfjh  jkasdfhjhfjhd djkshfjhdf   jhjdhfjh   djfhjh";
   cout << "Source string:\n" << str << endl;
   int max_count_space = 0;
   int count_space = 0;
   for (int i = 0; i< str.length(); i++)
   {
       if ( str[i] == ' ') 
       {
            count_space++;
            if (max_count_space < count_space)   max_count_space = count_space; 
       } 
       else {
               count_space = 0;   
           
       } 
   }
   string spase_string = "";
   for (int i = 0; i < max_count_space; i ++) spase_string +=' ';
   int d = 0;
while (str.find(spase_string) != -1)
{
 int space_position = str.find(spase_string);
 str = str.substr(0, space_position) + " " + str.substr(space_position + max_count_space, str.length() - space_position - max_count_space);
}
   cout <<  "Result string:\n" << str;   
    cin.get();
    cin.get();
    return 0;
}