How to remove digit, punct w/o ' ' spacing.

[Melicalol]

This is the code I want to improve.
Is it possible to remove words and punctuation without having to use spacing ' '?
If so can anyone show me how or show me an example? thanks.

** greentxt is failed old code( due to having trouble making it work).**

while (is.good()){
		getline (is,line);
			
			for (int i = 0; i< line.size(); i++) {
				if (isalpha(line[i]));
					line[i] =' ';
			}
			for (int i = 0; i< line.size(); i++){
				if (ispunct(line[i]));
				line[i] ='0';                          // remember to add two zero's for each % and /  in the other vector
			}
		
		/*for (int i = 0; i< line.size(); i++) {
		/	if(
				//if (isalpha(line[i]));
		line.erase(
      //std::remove_if(line.begin(), line.end(), &isalpha(line[i])),    // removes words (alpha)
		//line.end());
		
	   line.erase( std::remove_if(line.begin(), line.end(), &ispunct(line[i])),  //  PUNCH THEM punctuations outta here!
		line.end());
		}
		// convert a string to an int
		*/

	
#include "std_lib_facilities_3.h"	
#include <iostream>
#include <vector>
#include <fstream>
#include <iterator>
#include <algorithm> 




vector<string>& store_appointments(string file1, vector<string> appointments){
	ifstream is(file1.c_str());
	if (!is)
	{
		error ("Can't open the input file ", file1);
	}
  
	string line;
	vector<string> *appointments1 = new vector<string>();
	while (is.good())
    {
		getline (is,line);
				
			for (int i = 0; i< line.size(); i++) {
				if (isdigit(line[i]));
					line[i] =' ';
			}
			for (int i = 0; i< line.size(); i++){
				if (ispunct(line[i]));
				line[i] =' ';                          // remember to add two zero's for each % and /  in the other vector
			}
		
		appointments1->push_back(line);   
    }
	
	for (int j = 0; j<appointments.size()-1;++j){
		string temp1 = appointments[j] ;
		appointments1->push_back(temp1);
		}
	return *appointments1;
}
	
	

vector<int>& store_dates(string file1){
	vector<int> *dates = new vector<int>();
	
		
	ifstream is(file1.c_str());
	if (!is)
	{
		error ("Can't open the input file ", file1);
	}
	string line;
	while (is.good()){
		getline (is,line);
			
			for (int i = 0; i< line.size(); i++) {
				if (isalpha(line[i]));
					line[i] =' ';
			}
			for (int i = 0; i< line.size(); i++){
				if (ispunct(line[i]));
				line[i] ='0';                          // remember to add two zero's for each % and /  in the other vector
			}
		
		/*for (int i = 0; i< line.size(); i++) {
		/	if(
				//if (isalpha(line[i]));
		line.erase(
      //std::remove_if(line.begin(), line.end(), &isalpha(line[i])),    // removes words (alpha)
		//line.end());
		
	   line.erase( std::remove_if(line.begin(), line.end(), &ispunct(line[i])),  //  PUNCH THEM punctuations outta here!
		line.end());
		}
		// convert a string to an int
		*/
	istringstream buffer(line);
	int value;
	buffer >> value;  
		
		dates->push_back(value);   
    }
	return *dates;
}


	

vector<int>& store_months(string file1,vector<int> months)							// we gonna load that vector and divide each slot by  1000000 since its int and not double, we will get the exact month
{
		vector<int>dates = store_dates(file1.c_str());
		vector<int> *months1 = new vector<int>();

	for (int j = 0; j<dates.size()-1;++j){
		int	temp4 = dates[j] / 100000000 ;              // added 2 more zero's because / * 2   turns into two zeros
		months1->push_back(temp4);
	}
	for (int j = 0; j<months.size()-1;++j){
		int temp3 = months[j] ;
		months1->push_back(temp3);
		}
	return *months1;
}
		
		
		
vector<int>& store_dayyear(string file1)            					// ok now we make another vector temporary call it dayyear,  by taking %  1000000 of  dates
{

vector<int> dates = store_dates(file1.c_str());
vector<int>*dayyear = new vector<int>();
for (int j = 0; j<dates.size()-1;++j){
		int temp5 = dates[j] %100000000 ;
		dayyear->push_back(temp5);
		}
				return *dayyear;
}

vector<int>& store_days(string file1,vector<int> days)    // ok now we make  vector days1 divide temporary vector dayyear,  by /10000 gives us exact day.
{

vector<int>dayyear=store_dayyear(file1.c_str());

vector<int>*days1 = new vector<int>();
for (int j = 0; j<dayyear.size()-1;++j){
		
	int	temp6 = dayyear[j] /100000 ;
		days1->push_back(temp6);
		}		
		for (int j = 0; j<days.size()-1;++j){
		int temp4 = days[j] ;
		days1->push_back(temp4);
		}
				return *days1;
}
	
vector<int> store_years(string file1,vector<int> years)  // ok now we make  vector years1 modulo temporary vector dayyear,  by %10000 gives us exact year.
{

vector<int>dayyear= store_dayyear(file1.c_str());

vector<int>*years1 = new vector<int>();

for (int j = 0; j<dayyear.size()-1;++j){
		
	int	temp7 = dayyear[j] %100000 ;
		years1->push_back(temp7);
		}
		for (int j = 0; j<years.size()-1;++j){
		int temp2 = years[j] ;
		years1->push_back(temp2);
		}
				return *years1;
}
int main()
{	
	string file1;
	cout << "Please enter the name of the  input file \nEx: file1.txt \n";
	cin >> file1;

	int a = 0;
	vector<string> appointments; //  name of Appointments.
	string appointment;    
	vector<int> years;     //      I split old dates vector into 3 like you wanted   this one has years.
	vector<int> months;    //       Months
	vector<int> days;      //     Days.       
	
	int year;
	int month;
	int day;
	int temp1;
	int temp2;
	string temp3;
	string yes;
	while( a < 99) // limiting you to 99 appointments you HARD WORKING MAN YOU!
	{
		cout << "Would you like to add additional  appointments? type 'Yes' if you do or 'No' to keep going"  <<"\n";
		cin>>yes;
		if(yes!="Yes"){
			break;
		}
		
	
		cout << " Enter a name for an appointment -- 'NO SPACES' --" <<"\n";
		std::cin >> appointment;
		appointments.push_back (appointment);
		cout << "Enter Year  example: '2013' "  <<"\n";
		std::cin >> year;
		years.push_back (year);
		cout << "Enter month  example: '5' "  <<"\n";
		std::cin >> month;
		months.push_back (month);
		cout << "Enter day  example: '15' "  <<"\n";
		std::cin >> day;
		days.push_back (day);

		 
		
		a++;
    }

for (int j = 0; j<months.size()-1 && j<years.size()-1 && j<appointments.size()-1;++j)
{
	temp1 = months[j];
	temp2 = years[j];
	temp3 = appointments[j];	
		
	for(int i = 0; i<days.size()-1;++i)
	{
		if (days[i]> days[i+1])
		{
			days.push_back(i),
			months.push_back(temp1);
			years.push_back(temp2);
			appointments.push_back(temp3);
		}
	}
}
	vector<int> months1;
	vector<int> years1;
	vector<int> days1;
	vector<string> appointments1;

		
for (int j = 0; j<months1.size()-1 && j<years1.size()-1 && j<appointments1.size()-1;++j)
{
	temp1 = months1[j];
	temp2 = years1[j];
	temp3 = appointments1[j];	
		
	for(int i = 0; i<days1.size()-1;++i)
	{
		if (days1[i]> days1[i+1])
		{
			days1.push_back(i),
			months1.push_back(temp1);
			years1.push_back(temp2);
			appointments1.push_back(temp3);
		}
	}
}	
		return 0;
}

[cire]

You were on the right track with remove_if.

#include <iostream>
#include <string>
#include <algorithm>
#include <cctype>


int main()
{
    std::string line ;

    while ( getline(std::cin,line) && line.size() )
    {
        line.erase(std::remove_if(line.begin(), line.end(), std::isalpha), line.end()) ;
        std::cout << line << '\n' ;

        line.erase(std::remove_if(line.begin(), line.end(), std::ispunct), line.end()) ;
        std::cout << line << '\n' ;

        // Or, if you want to do it manually:
        //auto letter = line.begin() ;
        //while ( letter != line.end() )
        //{
        //    if ( std::isalpha(*letter) || std::ispunct(*letter) )
        //        letter = line.erase(letter) ;
        //    else
        //        ++letter ;
        //}        
    }

}