C program to open file and insert records as per user's wish on students' information.

 #include<stdio.h>
#include<conio.h>
struct student
{
char name[50];
int rollno;
int age;
float per;
};
int main()
{
char c;
struct student xyz;
FILE*fp;
fp=fopen("student.dat","w");
do
{
printf("\nEnter Name : ");
scanf("%s",xyz.name);
printf("\nEnter Roll Number : ");
scanf("%d",&xyz.rollno);
printf("\nEnter Age : ");
scanf("%d",&xyz.age);
printf("\nEnter Percentage : ");
scanf("%f",&xyz.per);
fprintf(fp,"%s\t %d\t %d\t %f\n",xyz.name,xyz.rollno,xyz.age,xyz.per);
printf("Wanna record More?\n ");
c=getche();
}while(c=='Y'||c=='y');
printf("\nThe records had been written successfully");
fclose(fp);
}