please help me to make this code it's the second one i post it here

Question

Find matching numbers in text files file1.txt and file2.txt and write them to a new text file result.txt. In each of the source files, the numbers are not repeated.

#include<iostream>
#include<fstream>
#include<iomanip>
#include<numeric>
#include<math.h>
using namespace std;
int main(){
int n1,n2;
int i=0;
int j=0;
char tab1[20]{};
char tab2[20]{};
fstream f1;
f1.open("c:\\Temp\\file1.txt",ios::in);
fstream f2;
f2.open("c:\\Temp\\file2.txt",ios::in);
fstream f3;
f3.open("c:\\Temp\\result.txt",ios::out|ios::trunc);

if(f1 && f2 && f3){
while(!f1.eof()&& !f2.eof()){

f1>>n1;
f2>>n2;
cout << n1 << " "<< n2<< endl;
do{
for(i=0;i<n1;i++){
cin>>tab1[i];
for(j=0;j<n2;j++){
if(tab1[i]==tab2[j])
cout<<tab1[i];
f3 << tab1[i] << endl;
i++;
}
}
} while(i<n1);

}
f1.close();
f2.close();
f3.close();
}
else{
cout<<"ERROR "<<endl;
}

system("pause");
return 0;

}

Answer 1

How see the input, I mean the text files?
How should be the output text file?
Do work your code, respectively what do not work and what is your question?
Where you need a help?

Answer 2

Just run it in sololearn if possible and share a link

Answer 3

Can you add to sololearn and share the link rather?

Answer 4

by the way f3 is empty

could you try this code in vs?

Answer 5

Issaka i don't understand your question