My programming works, My code book.
Coming soon….
no database software required…. no built in packages required… no prior knowledge required…. its just as simple as writing couple of most simple programs….. all that you need is PHP enabled web server…..
Check this link after few days…. 🙂
Q.) Ignore ‘Spaces’ and split sentence into words and store into array
Function:
<?php
function splitIt($s){
$arr = array('.',',');
$s = str_replace($arr," ",$s);
$s = preg_replace("/( )+/", " ", $s);
$s = preg_replace("/^( )+/", "", $s);
$s = preg_replace("/( )+$/", "", $s);
$tokens = explode(" ",$s);
return $tokens;
}
?>
Input:
<?php
$answer = splitIt(" hello world. prt this sentence,please ");
print_r($answer);
?>
Output:
Array (
[0] => hello
[0] => world
[0] => prt
[0] => this
[0] => sentence
[0] => please
)
After many days of gap… Â back to blogging…….
Q.) An integer is said to be a palindrome if it is equal to its reverse. For example, 79197 and 324423 are palindromes. In this task you will be given an integer N, 1 ≤ N ≤ 1000000. You must find the smallest integer M ≥ N such that M is a prime number and M is a palindrome. For example, if N is 31 then the answer is 101.
Input format
A single integer N, (1 ≤ N ≤ 1000000), on a single line.
Output format
Your output must consist of a single integer, the smallest prime palindrome greater than or equal to N
Sol.)
#include<stdio.h>
void main()
{
long int a;
printf("Enter number: ");
scanf("%li",&a);
if(a <= 1000000)
while(1)
{
if(palindrome(a)){
if(prime(a)) {printf("Number is: %d",a);getch();return;}
}
a=a+1;
}
else printf("Plz enter number less than 1000000 next time");
getch();
}
int prime(long int a){
long int i;
for(i=2;i<=a/2;i++) if(a%i==0)return 0;
return 1;
}
int palindrome(long int a){
long int temp=a,reverse=0;
while( temp != 0 ){
reverse = reverse * 10;
reverse = reverse + temp%10;
temp = temp/10;
}
if(reverse == a) return 1;
else return 0;
}
Shivaji varma… 😀
#include<stdio.h>
#include<stdlib.h>
#include<errno.h>
int main()
{
int desc[2];
if(pipe(desc)==-1)
{
perror("pipe failed"); exit(0);
}
if(!fork())
{
write(desc[1],"hello",6);
}
else{
char temp[20];
read(desc[0],temp,6);
printf("\n%s\n",temp);
}
}
<html>
<head>
<style>
.navBtn{
background-color:#EAECED;
color:#565656;
width:80px;
font-family:"Times New Roman", Times, serif;
font-size:larger;
font-weight:bold;
text-align:center;
padding:6px;
cursor:pointer;
border-radius: 4px 4px 4px 4px;
}
.navBtn a,a:visited{
text-decoration:inherit;
color:inherit;
}
.navBtn:hover{
background-color:#1EB4DA;
color:#EAECED;
}
.navActive{
background-color:#FF3C3C;
color:#EAECED;
}
</style>
</head>
<body>
<div class="navBtn">1</div>
<br>
<div class="navBtn">2</div>
<br>
<div class="navBtn">3</div>
</body>
</html>
The following c program parser the given string for the given grammar::
E->E+T
E->T
T->T*F
T->F
F->(E)
F->i
Before writing writing recursive descent parser first eliminate left recursion and left factoring.
E->TEplus
Eplus->+TEplus / ∈ (epsilon)
T ->FTplus
Tplus->*FTplus / ∈ (epsilon)
F-> (E)
F-> i
#include<stdio.h>
#include<string.h>
char string[' '];
int len;
int pos=0;
int E();
int Eplus();
int T();
int Tplus();
int F();
int main()
{
printf("Enter the string:: ");
scanf("%s",&string);
len=strlen(string);
if(E()==0) printf("\nNot Accepted");
else if(pos<len) {printf("\nNot Accepted");}
else printf("\nAccepted");
printf("\n");
return 0;
}
int E()
{
if(T()==0) return 0;
if(Eplus()==0) return 0;
return 1;
}
int Eplus()
{
if(string[pos]=='+')
{ pos++;
if(T()==0) return 0;
if(Eplus()==0) return 0;
}
return 1;
}
int T()
{
if(F()==0) return 0;
if(Tplus()==0) return 0;
return 1;
}
int Tplus()
{
if(string[pos]=='*')
{ pos++;
if(F()==0) return 0;
if(Tplus()==0) return 0;
}
return 1;
}
int F()
{
if(string[pos]=='('){
pos++;
if(E()==0) return 0;
if(string[pos]==')') pos++;
else return 0;
}
else if(string[pos]=='i'){
pos++;}
else {return 0;}
return 1;
}
#include<stdio.h>
#include<string.h>
FILE *fp;
char prodFile[]="test.txt";
char relFile[]="table.txt";
int numProductions,numTerminals,top=0,terTop=0,ip=0;
int relationTable[' '][' '];
char stack[' ']="$";
char inputBuffer[' '];
char string[' '];
char handle[' '],handTopTer;
char term[' '];
struct
{
char left;
char right[' '];
}prod[' '];
void readProductions()
{
int i,j;
char line[30];
fp=fopen(prodFile,"r");
for(i=0;fscanf(fp,"%s",line)==1;i++)
{
prod[i].left=line[0];
for(j=2;line[j]!='';j++)
prod[i].right[j-2]=line[j];
prod[i].right[j-2]='';
}
numProductions=i;
printf("Productions::\n");
for(i=0;i<numProductions;i++){
printf("%c>",prod[i].left);
printf("%s\n",prod[i].right);
}
}
int validateNonTer(char z)
{
int i;
for(i=0;i<numProductions;i++)
{
if(z==prod[i].left) {return 1;}
}
return 0;
}
void findTerminals()
{
int i,j;
numTerminals=0;
for(i=0;i<numProductions;i++)
for(j=0;prod[i].right[j]!='';j++)
if(!validateNonTer(prod[i].right[j]))Â
{term[numTerminals]=prod[i].right[j];numTerminals++;}
printf("\nTerminals::\n");
for(i=0;i<numTerminals;i++)
printf("%c\n",term[i]);
}
void readRelationTable()
{
int i,j,k=0;
fp=fopen(relFile,"r");
for(i=0;i<=numTerminals;i++)
for(j=0;j<=numTerminals;j++)
{
fscanf(fp,"%d",&relationTable[i][j]);
}
printf(" ");
for(i=0;i<=numTerminals;i++)
if(i==numTerminals) printf(" $");
else printf("%2c ",term[i]);
for(i=0;i<=numTerminals;i++)
{
if(numTerminals==i) printf("\n$");
else printf("\n%c",term[i]);
for(j=0;j<=numTerminals;j++)
printf("%2d ",relationTable[i][j]);
}
}
int searchProd(char z[50])
{
int i;
for(i=0;i<numProductions;i++)
if(strcmp(z,prod[i].right)==0) return i;
return -1;
}
int pos(char z)
{
int i;
for(i=0;i<numTerminals;i++)
if(term[i]==z) {return i;}
if(z=='$') return i;
else return -1;
}
void push(char z)
{
top++;
stack[top]=z;
if(pos(stack[top]) != -1) terTop=top;
printf("push::%c\n",z);
}
void terToprec()
{
terTop--;
while(pos(stack[terTop])== -1) terTop--;
}
char pop()
{
if(pos(stack[top])!= -1)
{terToprec();handTopTer=stack[top];}
char temp=stack[top];
printf("pop::%c\n",temp);
top--;
return temp;
}
void reverse(char *r)
{
int len=strlen(r),i;
for(i=0;i<len/2;i++)
{
char temp=r[i];
r[i]=r[len-1-i];
r[len-1-i]=temp;
}
}
int Parse()
{
int i;
char a,b;
printf("\n\nEnter string::");
scanf("%s",string);
for(i=0;string[i]!='';i++)
inputBuffer[i]=string[i];
inputBuffer[i]='$';
while(1)
{
if(stack[terTop]=='$' && inputBuffer[ip]=='$') return 1;
else {
a=stack[terTop];
b=inputBuffer[ip];
printf("\na::%c b::%c\n",a,b);
if(relationTable[pos(a)][pos(b)]== 1 ||
relationTable[pos(a)][pos(b)]==0)
{push(b);ip++;}
else if(relationTable[pos(a)][pos(b)]==2)
{
int k=0;
handle[k]=pop();
if(pos(handle[k])== -1) {k++;handle[k]=pop();}
k++;
while(relationTable[pos(stack[terTop])][pos(handTopTer)]
!= 1)
{handle[k]=pop();k++;}
while(terTop!=top) {handle[k]=pop();k++;}
handle[k]='';
reverse(handle);
printf("Handle %s\n",handle);
if(searchProd(handle)!=-1)
push(prod[searchProd(handle)].left);
else return 0;
}
else return 0;
}
}
}
int main()
{
readProductions();
findTerminals();
readRelationTable();
if(Parse()) printf("Accepted");
else printf("InValid");
getch();
}
For connecting to MySQL database, PHP offers several inbuilt functions and hence makes the work a lot easier.
mysql_connect()
mysql_close()
mysql_create_db()
to list a few. These are the most used functions for referring the database.
Here is the simple example:
| $link = mysql_connect(‘localhost’, ‘mysql_user’, ‘mysql_password’);if (!$link) {
die(‘Could not connect: ‘ . mysql_error()); } echo ‘Connected successfully’; mysql_close($link); |
What is the difference between DDL, DML, DCL and TCL? Well look below…
Data Definition Language (DDL) statements are used to define the database structure or schema. Some examples:
CREATE – to create objects in the database
ALTER – alters the structure of the database
DROP – delete objects from the database
TRUNCATE – remove all records from a table, including all spaces allocated for the records are removed
COMMENT – add comments to the data dictionary
RENAME – rename an object
Data Manipulation Language (DML) statements are used for managing data within schema objects. Some examples:
SELECT – retrieve data from the a database
INSERT – insert data into a table
UPDATE – updates existing data within a table
DELETE – deletes all records from a table, the space for the records remain
MERGE – UPSERT operation (insert or update)
CALL – call a PL/SQL or Java subprogram
EXPLAIN PLAN – explain access path to data
LOCK TABLE – control concurrency
Data Control Language (DCL) statements. Some examples:
GRANT – gives user’s access privileges to database
REVOKE – withdraw access privileges given with the GRANT command
Transaction Control (TCL) statements are used to manage the changes made by DML statements. It allows statements to be grouped together into logical transactions.
COMMIT – save work done
SAVEPOINT – identify a point in a transaction to which you can later roll back
ROLLBACK – restore database to original since the last COMMIT
SET TRANSACTION – Change transaction options like isolation level and what rollback segment to use
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