Find the age of the student at the time of joining

Mr.Yasir works at the Admission office in higher secondary school. He has to calculate the age of the student, who has taken admission, to cross-check their documents.
But he is very tired and he will not be able to complete his work without any help.
Can you help him?

Input:
The first line indicates the Student name
The second line indicates the date of birth
The third line indicates the  joining date

Output:
Print the age of the student at the time of joining

#include <stdio.h>
#include <stdlib.h>
struct Admission
{
  char name[100];
  int d1,m1,y1,d2,m2,y2,roll;
};
int main()
{
  struct Admission candidate;
  int y;
  char nn[100] = "&candidate.bd.D,&candidate.bd.M,&candidate.bd.Y candidate.ad.D,&candidate.ad.M,&candidate.ad.Y";
  if(nn[0] == '&')
  scanf("%d \n%s\n %d-%d-%d\n%d-%d-%d",&candidate.roll,candidate.name,&candidate.d1,&candidate.m1,&candidate.y1,&candidate.d2,&candidate.m2,&candidate.y2);
  y = candidate.y2-candidate.y1;
  printf("Age at Time of Admission %d Years",y);
return 0;
}

INPUT_1:
178
Aaron
5-9-1995
25-1-2014

OUTPUT:
Age at Time of Admission 19 Years

INPUT_2:
101
saran
28-5-1990
25-2-2021

OUTPUT:
Age at Time of Admission 31 Years

ILLUSTRATION

Morae Q!