MarkSheet Preparation Using SharedMemory –I

PROGRAM:

#include<sys/types.h>

#include<sys/ipc.h>

#include<sys/shm.h>

#include<unistd.h>

#include<stdio.h>

#include<sys/stat.h>

#include<string.h>

struct stud

{

char name[25];

int roll,m1,m2,m3,tot;

float avg;

};

main()

{

struct stud m,*p;

p=&m;

int shmid;

shmid=shmget((key_t)1300,1024,0600|IPC_CREAT);

if(shmid==-1)

{printf("shmget failed");

return;

}

p=(struct stud *)shmat(shmid,0,0);

if(p==(void *)-1)

{

printf("shmat failed");

return;

}

printf("Enter the name:\n");

scanf("%s",p->name);

printf("Enter the Roll.No:\n");

scanf("%d",&p->roll);

printf("Enter the marks  got in 3 subject: \n");

scanf("%d%d%d",&p->m1,&p->m2,&p->m3);

printf("\nThe given information is placed in shared memory\n");

}

OUTPUT:

[user @localhost ~]$ cc marsh.c

[user @localhost ~]$ ./a.out

Enter the name:

Kannan

Enter the Roll.No:

987

Enter the marks  got in 3 subject:

89 98 78

The given information is placed in shared memory

[user @localhost ~]$