void record_update(FILE * fp)
{
emp_rec upd_emp;
int emp_no,c=0;
long pos;
printf("Enter the employee no for update:");
scanf("%d",&emp_no);
pos=record_search(fp,emp_no);
if(pos !=-1)
{
fseek(fp,pos,SEEK_SET);
fread(&upd_emp,sizeof(emp_rec),1,fp);
printf("\t\t\tDetails of Employee No: %d\n",upd_emp.emp_no);
printf("\tEmployee Name:%s\n",upd_emp.emp_name);
printf("\tEmployee Salary:%lf",upd_emp.emp_sal);
printf("\tEmployee Address:%s\n",upd_emp.emp_add);
printf("\tEmployee Mobile:%s\n",upd_emp.emp_mobile);
printf("Do you want to update Name?\n1. For Yes \n2. For No\n:");
scanf("%d",&c);
getchar();
if(c==1)
scanf("%[^\n]s",upd_emp.emp_name);
printf("Do you want to update Salary?\n1. For Yes \n2. For No\n:");
scanf("%d",&c);
getchar();
if(c==1)
scanf("%lf",&upd_emp.emp_sal);
printf("Do you want to update Address?\n1. For Yes \n2. For No\n:");
scanf("%d",&c);
getchar();
if(c==1)
scanf("%[^\n]s",upd_emp.emp_add);
printf("Do you want to update Mobile?\n1. For Yes \n2. For No\n:");
scanf("%d",&c);
getchar();
if(c==1)
scanf("%[^\n]s",upd_emp.emp_mobile);
fseek(fp,-sizeof(emp_rec),SEEK_CUR);
fwrite(&upd_emp,sizeof(emp_rec),1,fp);
}
}
void record_delete(FILE * fp, FILE * delemp)
{
emp_rec del_emp;
int emp_no;
long pos;
printf("Enter the employee number for deletion:");
scanf("%d",&emp_no);
pos=record_search(fp,emp_no);
if(pos!=-1)
{
fseek(fp,pos,SEEK_SET);
del_emp.emp_no=-1;
fwrite(&del_emp,sizeof(emp_rec),1,fp);
fseek(delemp,0,SEEK_END);
fwrite(&emp_no,sizeof(int),1,delemp);
fwrite(&pos,sizeof(long),1,delemp);
}
}
int bbsfdel_main(void)
{
if (!loginok)
return BBS_ELGNREQ;
char *user = getparm("u");
if (*user != '\0') {
char file[HOMELEN];
sethomefile(file, currentuser.userid, "friends");
record_t r;
if (record_open(file, O_RDWR, &r) < 0)
return BBS_EINTNL;
override_t key;
strlcpy(key.id, user, sizeof(key.id));
override_t *ptr =
record_search(&r, &key, sizeof(key), lsearch, cmp_override);
if (ptr != NULL)
record_delete(&r, ptr, sizeof(*ptr));
record_close(&r);
}
printf("Location: fall\n\n");
return 0;
}
//为每一个trie结点生成候选字列表
void gen_trie_each_node(struct SOTrie *so, const char *stroke_stack, int sp)
{
int i;
//for (i = 0; i < sp; ++i) putchar(stroke_stack[i]);
//putchar(' ');
int start = 0, end = 0;
record_search(stroke_stack, sp, &start, &end);
//printf("start=%d,end=%d\n", start, end);
srp_count = 0;
for (; start <= end; ++start) {
srp_array[srp_count] = &global_srecord[start];
srp_count ++;
}
qsort(srp_array, srp_count, sizeof(struct SRecord *), _comp);
for (i = 0; i < (srp_count > MAX_DATA ? MAX_DATA : srp_count); ++i) {
//putgbkchr(srp_array[i] -> chareter);
if (so -> sdata == NULL) so -> sdata = sdata_new();
sdata_insert(so -> sdata, srp_array[i] -> chareter, so -> sdata -> count);
}
//putchar('\n');
}
void menu()
{
emp_rec ser_emp;
int c=0,emp_no;
long pos;
FILE * fp,* eno,* delemp;
if((fp=fopen("emp.dat","rb+"))==NULL)
{
printf("Error 1: Problem with main file opening.\n");
exit(ferror(fp));
}
if((eno=fopen("empno.dat","rb+"))==NULL)
{
printf("Error 2: Problem with employee no file.\n");
exit(ferror(fp));
}
if((delemp=fopen("delemp.dat","rb+"))==NULL)
{
printf("Error 3: Problem with deleted employee file.\n");
delemp=fopen("delemp.dat","wb+");
}
while(c!=6)
{
printf("\t\t\t\t Menu for Employee Record Base\n");
printf("\t\t\t1.Employee Record Insertion\n");
printf("\t\t\t2.Employee Record Search\n");
printf("\t\t\t3.Employee Record Update\n");
printf("\t\t\t4.Employee Record Delete\n");
printf("\t\t\t5.Display All Employees\n");
printf("\t\t\t6.Exit the program.\n");
printf("\t\t\t\t Enter your choice:");
scanf("%d",&c);
switch(c)
{
case 1:
record_insert(fp,eno);
break;
case 2:
printf("Enter the employee no to search:");
scanf("%d",&emp_no);
if((pos=record_search(fp,emp_no))==-1)
printf("Employee does not exist.\n");
else
{
printf("Employee exists.\n");
fseek(fp,pos,SEEK_SET);
fread(&ser_emp,sizeof(emp_rec),1,fp);
printf("\t\t\tDetails of Employee No: %d\n",ser_emp.emp_no);
printf("\tEmployee Name:%s\n",ser_emp.emp_name);
printf("\tEmployee Salary:%lf",ser_emp.emp_sal);
printf("\tEmployee Address:%s\n",ser_emp.emp_add);
printf("\tEmployee Mobile:%s\n",ser_emp.emp_mobile);
}
break;
case 3:
record_update(fp);
break;
case 4:
record_delete(fp,delemp);
break;
case 5:
fseek(fp,0,SEEK_END);
pos=ftell(fp);
fseek(fp,0,SEEK_SET);
while((pos!=ftell(fp))&&(!feof(fp)))
{
fread(&ser_emp,sizeof(emp_rec),1,fp);
if(ser_emp.emp_no!=-1)
{
printf("\t\t\tDetails of Employee No: %d\n",ser_emp.emp_no);
printf("\tEmployee Name:%s\n",ser_emp.emp_name);
printf("\tEmployee Salary:%lf",ser_emp.emp_sal);
printf("\tEmployee Address:%s\n",ser_emp.emp_add);
printf("\tEmployee Mobile:%s\n",ser_emp.emp_mobile);
printf("\n\n"); }
}
break;
case 6:
printf("Exiting...and closing the files\n");
fclose(fp);
fclose(eno);
fclose(delemp);
break;
}
}
}
