-
Notifications
You must be signed in to change notification settings - Fork 73
/
modification.c
42 lines (42 loc) · 1.26 KB
/
modification.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
#include<stdio.h>
struct student
{
int rollno;
int sub1;
int sub2;
};
int main ()
{
FILE *ab;
struct student x;
int ch;
printf("Enter your choice:\n 1.Create File \n 2.See List\n 3.Add new record\n ");
scanf("%d",&ch);
switch(ch)
{
case 1 : ab=fopen("stu.dat","wb");
for (int i=0;i<5;i++)
{
printf("enter roll and then marks in 2 subject:");
scanf("%d %d %d",&x.rollno,&x.sub1,&x.sub2);
fwrite(&x,sizeof(x),1,ab);
}
fclose(ab);
break;
case 2 : ab=fopen("stu.dat","rb");
while (fread(&x,sizeof(x),1,ab)==1)
{
printf("%d %d %d\n",x.rollno,x.sub1,x.sub2);
}
fclose(ab);
break;
case 3 : ab=fopen("stu.dat","ab");
printf("enter roll and then marks in 2 subject:");
scanf("%d %d %d",&x.rollno,&x.sub1,&x.sub2);
fwrite(&x,sizeof(x),1,ab);
fclose(ab);
break;
default : printf("You choosed wrong");
}
return 0;
}