C++ Program to find greater number among three variable using nested if

C++ Program to find greater number among three variable using nested if #include<iostream.h> #include<conio.h> void main() {  int a,b,c;  clrscr();  cout<<"\nEnter First Number: ";  cin>>a;  cout<<"\nEnter Second Number: ";  cin>>a;  cout<<"\nEnter Third Number: ";  cin>>a;     if(a>b)   {          if(a>c)   {             cout<<"\n a is greater";   }   else   {             cout<<"\n c is greater";   }       }   else if(b>c)   {    cout<<"\n b is greater";   }   else   {    cout<<"\n c is greater";   }  getch(); }