MarkSheet Preparation Using SharedMemory –II

 PROGRAM:

#include<sys/types.h>

#include<sys/ipc.h>

#include<sys/msg.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)1300,1024,0660|IPC_CREAT);

if(shmid==-1)

{printf("shmget failed");

return;

}

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

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

{printf("shmat failed");

return;

}

p->tot=p->m1+p->m2+p->m3;

p->avg=(float)p->tot/3.0;

printf("\nNAME: %s",p->name);

printf("\nROLLNO:%d",p->roll);

printf("\nMARK1:%d",p->m1);

printf("\nMARK@:%d",p->m2);

printf("\nMARK#:%d",p->m3);

printf("\nTOTAL:%d",p->tot);

printf("\nAVERAGE:%f",p->avg);

}

OUTPUT:

[user @localhost ~]$ cc cmarsh.c

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

NAME: Kannan

ROLLNO:987

MARK1:89

MARK@:98

MARK#:78

TOTAL:265

AVERAGE:88.333336[user @localhost ~]$