Showing segmentation fault

#1

#include
using namespace std;

int fun (int n,int m)
{
if (n=0)
{
return 0;
}
int x= fun(n-1,m) +fun(n-m,m);
return x;
}
int main() {
int n,m,t;
cin>>t;
for (int i=0;i<t;i++)
{
cin>>n;
cin>>m;
int x=fun(n,m);
cout<<x;

}
return 0;

}

#2

hello @ss312
add some more base case.
if n<m return 1
if n==m return 2

#3

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