programs of C and Data Structures print day time date month year

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Structure with in structure C program  how to write c program using structure with in structure, structure with in structure example with source code c programming ,function pointer example, print day , month and year using structure with in structure example with source code, c program example structure with in structure print  date time year

#include
#include
struct dob{

     int dy;

        char mon[10];

        int yr;

  };

struct stud{ int rno;
                       char nm[20];
                        struct dob d;

          };

void pr(struct stud ); //fn declaration

void main()

{  typedef struct stud mca;

     mca s1;  clrscr();
  printf("  enter structure element : \n ");
  printf("___________________________________: \n \n\n");
  printf("R.No : ");  scanf("%d",&s1.rno);
  fflush(stdin);
  printf("Name :  ");
  fflush(stdin);
  gets(s1.nm);
  printf("Date of birth : ");
  fflush(stdin);
  scanf("%d",&s1.d.dy);
  fflush(stdin);
  gets(s1.d.mon);
  fflush(stdin);
  scanf("%d",&s1.d.yr);
  pr(s1);  getch();

}

void pr(struct stud s)

{

 printf("\n_____________________\n");

 printf("id=%d  Name=%s Dob= %d-%s-d",s.rno,s.nm,s.d.dy,s.d.mon,s.d.yr);

}

output: