Dynamic records using structure

Q : Write a program to input name of age record of a company. How many records have to input? It will ask at run time. After input complete, program will print all the records with average age.

Solution : 

/*==============================

     Girfa Student Help

     Program : Age calculation in dynamic structure

     More Program : http://girfahelp.blogspot.in/p/c-language-structure-programming.html

================================*/

#include<stdio.h>

#include<conio.h>

typedef struct stu

{

     char name[20];

     int age;

}student;

void main()

{

     student *pt;

     int i,sum=0,count,j;

     clrscr();

     pt=(student*) malloc(sizeof(student)*i);

     for(j=0;j<i;j++)

     {

          printf("\nEnter Age for %d record>> ",j+1);

          scanf("%d",&pt[j].age);

          sum+=pt[j].age;

          printf("Enter Name for %d record>> ",j+1);

          fflush(stdin);

          gets(pt[j].name);

     }

     clrscr();

     for(j=0;j<i;j++)

     {

          printf("\nName=%s, Age=%d",pt[j].name,pt[j].age);

     }

     printf("\n\n\tAverage=%d",sum/i);

     getch();

}

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