Problem using getline and strtok together in a program

Question

In the program below, I intend to read each line in a file in line, line break and display single words. The problem I am facing is that now the program only displays the first line in the file. I do not understand why this is happening?

#include<iostream>
#include<string>
#include<fstream>
#include<cstdio>
using namespace std;

int main()
{
    ifstream InputFile("hello.txt") ;
    string store ;
    char * token;

    while(getline(InputFile,store))
    {
        cout<<as<<endl;
        token = strtok(&store[0]," ");
        cout<<token;
        while(token!=NULL)
        {
        token = strtok(NULL," ");
        cout<<token<<" ";
        }

    }

}

Answer 1

I am new to C ++, but I think an alternative approach might be:

while(getline(InputFile, store))
{
    stringstream line(store); // include <sstream>
    string token;        

    while (line >> token)
    {
        cout << "Token: " << token << endl;
    }
}

This will parse your file line by line and mark each line based on the separation of spaces (so this includes more than just spaces, such as tabs and newlines).

Answer 2

, . strtok() , std::string .

std::string, c_str(), const char* (.. ). strtok() char* .

strtok(), , , std::string std::vector - :

std::string s("hello, world");
std::vector<char> v(s.begin(), s.end());
v.push_back('\0');

( &v[0]) strtok().

Boost, Boost Tokenizer. .

Answer 3

What James McNellis says is correct.

For a quick fix (though not the best) instead

string store

using

const int MAX_SIZE_LINE = 1024; //or whatever value you consider safest in your context.
char store[MAX_SIZE_LINE];