Registration

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int main()
{
    int *ptr;
    int n,i,e;
    char *ptr1;
    char answer;
    n=1;
    i=0;
    ptr=(int*)malloc(n*sizeof(int));
    ptr1=(char*)malloc(n*sizeof(char));
    printf("Enter the roll number of the student:");
    scanf("%d",&ptr[0]);
    printf("Enter the name of the student:");
    scanf("%s",&ptr1[0]);
    printf("Do you want to enter any more participants(Y/N):");
    scanf(" %c",&answer);
    do{
        i=i+1;
        e=n+i;
        ptr=realloc(ptr,e*sizeof(int));
        ptr1=realloc(ptr1,e*sizeof(char));
        printf("Enter The roll number of the student:");
        scanf("%d",&ptr[i]);
        printf("Enter the name of the student:");
        scanf("%s",&ptr1[i]);
        printf("Do You Want to enter any more participants(Y/N):");
        scanf(" %c",&answer);
    }while ( answer == 'Y' || answer == 'y');
    printf("Exit");
}