Structure record input-read in file | C Langauge

Q : Write a program to write records of students in a file, where each record consists of student name, roll number, CGPA, and address. Read the records back from the file and display them.

Code : 

#include<stdio.h>

#include<conio.h>

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

     Girfa Student Help

     Structure write back to file

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

struct stu

{

     char name[20];

     int roll;

     int cgpa;

     char add[20];

};

void main()

{

     FILE *ft;

     struct stu ob;

     int r,i;

     clrscr();

     ft=fopen("test.txt","w");

     if(ft==NULL)

           puts("Output file opening error");

     else

     {

           printf("How many record you want to enter>> ");

           scanf("%d",&r);

           for(i=1;i<=r;i++)

           {

                fflush(stdin);

                printf("\nEnter name for %d record>> ",i);

                gets(ob.name);

                printf("Enter roll for %d record>> ",i);

                scanf("%d",&ob.roll);

                printf("Enter CGPA for %d record>> ",i);

                scanf("%d",&ob.cgpa);

                fflush(stdin);

                printf("Enter address for %d record>> ",i);

                gets(ob.add);

                fwrite(&ob,sizeof(ob),1,ft);

 

           }

           fclose(ft);

           ft=fopen("test.txt","rb");

           clrscr();

           while(fread(&ob,sizeof(ob),1,ft)==1)

           {

                printf("\n\nName=%s",ob.name);

                printf("\nRoll=%d",ob.roll);

                printf("\nCGPA=%d",ob.cgpa);

                printf("\nAddress=%s",ob.add);

           }

     }

     getch();

}

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