C....made easy by Mr. Pramod Shetty 8

main(){
struct xx{
int x;
struct yy{
char s;
struct xx *p;
};
struct yy *q;
};
}

Answer:
No output.

Explanation
ek hi tarah ke structures ke pointer ko hum self refrential pointers kehte hain.
ye basically datastructures mein use kiye jate hain. trees mein. inhe nested structures bhi kehte hain.