plllllllllz help me

i do not want to make the program receives the data had previously been introduced

plz help me

Code:

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

int hour[10];
FILE *p;
struct address
{
char city[20],town[20],street[20];
int homeno;
};
struct studentdata
{
int num;
float gpa;
char name[20];
char ***[5];
int deg[10];
struct address add;
struct studentdata *next;}data ,temp;
//get function
void getdata()
{

fflush(stdin);
printf("name:\n");
scanf("%s",temp.name);
printf("***:\n");
scanf("%s",temp.***);
printf("city:\n");
scanf("%s",temp.add.city);
printf("town:\n");
scanf("%s",temp.add.town);
printf("street:\n");
scanf("%s",temp.add.street);
printf("home number:\n");
scanf("%d",&temp.add.homeno);
for(int i=0;i<10;i++)

{
printf("\nsubject %d :",i+1);
scanf("%d",&temp.deg[i]);
printf("hour for subject %d :",i+1);
scanf("%d",&hour[i]);
}}
//gpc function
void	gpc()
{
int	point,sumh=0,sump=0,j;

for(j=0;j<10;j++)
{ point=((temp.deg[j])*(hour[j]))/25;
sump=sump+point ;
sumh=sumh+hour[j];
}
temp.gpa=sump/sumh;

}
//search function
void search(int num)
{

p=fopen("data.txt","r");
if(p==NULL)
{printf("erorr");
exit(0);
}
else
{
while(!feof)
{fseek(p,sizeof(studentdata),SEEK_SET);
fread(&temp,sizeof(studentdata),1,p);
if(num==temp.num)
break;
}
//when the pointer in the end of file
}}

void main()
{//being program
int no;
FILE *ptr;
scanf("%d",&no);
search(no);
if(no!=temp.num)
{ getdata();
temp.num=no;
gpc();

ptr=fopen("data.txt","a");
if(ptr==NULL)
{printf("error");
exit(0);}

else
{
fprintf(ptr,"%d%s%s%s%s%s%d%f",temp.num,temp.name,temp.***,temp.add.city,temp.add.town,temp.add.street,temp.add.homeno,temp.gpa);
for(int i=0;i<10;i++)
fprintf(ptr,"%d",temp.deg[i]) ;
fclose(ptr) ;
}

}	 }