Symbol Table With Hashing in C

#include<stdio.h>
#include<conio.h>
#include<stdlib.h>
#include<string.h>
#define MAX 11
char l[10];
struct symb
{
int add;
char label[10];
}sy[11];
void search();
void main()
{
int a[MAX],num,key,i,ch;
char ans;
int create(int);
void lprob(int [],int,int);
void display(int []);
clrscr();
for(i=0;i<MAX;i++)
a[i]=0;
do
{
printf("\nenter your choice: 1.create a symbol table 2.search in the symbol table\n");
scanf("%d",&ch);
switch(ch)
{
case 1:
do
{
printf("\nEnter the address:");
scanf("%d",&num);
key=create(num);
printf("enter The label:");
scanf("%s",l);
lprob(a,key,num);
printf("\nContinue(y/n)?");
ans=getche();
}
while(ans=='y');
display(a);
break;
case 2:
search();
break;
}
}while(ch<=2);
getch();
}

int create(int num)
{
int key;
key=num%11;
return key;
}

void lprob(int a[MAX],int key,int num)
{
int flag,i,count=0;
void display(int a[]);
flag=0;
if(a[key]==0)
{
a[key]=num;
sy[key].add=num;
strcpy(sy[key].label,l);
}
else
{
i=0;
while(i<MAX)
{
if(a[i]!=0)
count++;
i++;
}
if(count==MAX)
{
printf("\nHash table is full");
display(a);
getch();
exit(1);
}
for(i=key+1;i<MAX;i++)
if(a[i]==0)
{
a[i]=num;
flag=1;
sy[key].add=num;
strcpy(sy[key].label,l);
break;
}
for(i=0;i<key && flag==0;i++)
if(a[i]==0)
{
a[i]=num;
flag=1;
sy[key].add=num;
strcpy(sy[key].label,l);
break;
}
}
}
void display(int a[MAX])
{
FILE *fp;
int i;
fp=fopen("symbol.txt","w");
printf("\nThe Symbol Table is");
printf("\nhashvalues address label");
for(i=0;i<MAX;i++)
{
printf("\n%d\t %d\t %s",i,sy[i].add,sy[i].label);
fprintf(fp,"\n%d %d %s",i,sy[i].add,sy[i].label);
}
fclose(fp);
}

void search()
{
FILE *fp1;
char la[10];
int set=0,s;
int j,i;
printf("enter the label: ");
scanf("%s",la);
fp1=fopen("symbol.txt","r");
for(i=0;i<MAX;i++)
{
fscanf(fp1,"%d%d",&j,&sy[i].add);
if(sy[i].add!=0)
fscanf(fp1,"%s",sy[i].label);
}
for(i=0;i<MAX;i++)
{
if(sy[i].add!=0)
{
if(strcmp(sy[i].label,la)==0)
{
set=1;
s=sy[i].add;
}
}
}
if(set==1)
printf("\nThe label --%s-- is present in the symbol table at address:%d\n",la,s);
else
printf("\nThe label is not present in the symbol table\n");
}

enter your choice: 1.create a symbol table 2.search in the symbol table
1

Enter the address:1000
enter The label:data

Continue(y/n)?y
Enter the address:1003
enter The label:data1

Continue(y/n)?y
Enter the address:1007
enter The label:data2

Continue(y/n)? n

The Symbol Table is

hashvalues	address	label
0	0
1	0
2	1003	data1
3	0
4	0
5	0
6	1007	data2
7	0
8	0
9	0
10	1000	data

enter your choice: 1.create a symbol table 2.search in the symbol table
2
enter the label: data

The label --data-- is present in the symbol table at address:1000

enter your choice: 1.create a symbol table 2.search in the symbol table
2
enter the label: data4

The label is not present in the symbol table

enter your choice: 1.create a symbol table 2.search in the symbol table