Sender Cyclic Redundancy Check Code - Why isn't my code working? - c++

Question

Given a frame and generator, no. of bits in generator is n
you have to put n-1 number of zeroes behind frame
then the first n bits of frame are XORed with the generator
this is continued until the remainder has n-1 digits
then last n-1 digits of frame(which were the zeroes we added in step 1) are replaced by n-1 digits of
remainder
this is to be displayed
It executes, takes input but the cursor just blinks instead of giving output
#include<iostream>
#include<string>
using namespace std;
class CRC
{
int frame[32], generator[10],f,g;
public:
void input();
void check();
}obj;
void CRC::input()
{
int i;
cout<<"Enter length of frame:";
cin>>obj.f;
cout<<"Enter frame:";
for(i=0;i<obj.f;i++)
{
cin>>obj.frame[i];
}
cout<<"Enter length of generator:";
cin>>obj.g;
cout<<"Enter generator:";
for(i=0;i<obj.g;i++)
{
cin>>obj.generator[i];
}
obj.f=obj.f+obj.g-1;
obj.check();
}
void CRC::check()
{
int p[32],k=0,i;
for(i=0;i<obj.f;i++)
{
p[i]=obj.frame[i];
}
while((obj.f-k)>=g)
{
for(i=k;i<obj.g+k;i++)
{
p[i]=p[i]^generator[i];
}
for(i=obj.g+k;i<obj.f;i++)
{
p[i]=frame[i];
}
for(i=0;i<obj.f;i++)
{
if(p[i]==1)
{
k=i;
break;
}
}
}
for(i=obj.f-obj.g;i<obj.f;i++)
{
obj.frame[i]=p[i];
}
cout<<"Original message:";
for(i=0;i<obj.f;i++)
{
cout<<obj.frame[i];
}
}
int main()
{
obj.input();
return 0;
}