Easy way to Tokenize a file

[ASCE]

Input file
int a;
int b;
a=2;
b=4;
print a;


Here is my code

#include <iostream>
#include <string>
#include <fstream>

using namespace std;

void main()
{
string data="",super="",inp[12];
fstream f;
size_t a;
int i=0;
bool check=true;
f.open("inp.txt",ios::in);

while(f.good())
{
check=true;

getline(f,data);


while(check)
{
a=data.find(' ');
if(a!=string::npos) /*1st token*/
{
super=data.substr(0,a);

}
else
{
super=data.substr(0,data.size()); /* last token end of inner while */
check=false;
}
if(super!="")
{
inp[i++]=super;/* Token insertion*/
}
data=data.substr(a+1,data.size()); /* 2nd substring the original string */
}

}

f.close();

for(int j=0;j<i;j++)
cout<<inp[j]<<endl;
}