write a program for copying structure into another structure object

#include<conio.h>
#include<stdio.h>
#include<string.h>
struct stud
{
char name[25];
int roll;
int marks;
}s;
void main()
{
  int i;
  clrscr();
  struct stud s1,s2,s3;
  printf("\n Enter your name\t\t:\t");
  scanf("%s",&s1.name);
  printf("\n Enter your Roll No\t\t:\t");
  scanf("%d",&s1.roll);
  printf("\n Enter your 5 subject marks\t:\t");
  scanf("%d",&s1.marks);
  clrscr();
// Copy structure  method  1


  strcpy(s2.name,s1.name);
  s2.roll=s1.roll;
  s2.marks=s1.marks;


// Copy structure  method  2


  s3=s1;


  printf("\n Your Entire Details are");
  printf("\n Nmae \t Roll No\t Marks");
  printf("\n %s\t %d\t %d \t\b",s1.name,s1.roll,s1.marks);
  printf("\n\n %s\t %d\t %d \t\b",s2.name,s2.roll,s2.marks);
  printf("\n\n %s\t %d\t %d \t\b",s3.name,s3.roll,s3.marks);
  getch();
  }