1.Social Media Program.

#include<iostream.h>
#include<stdio.h>
#include<stdlib.h>
#include<string.h>
struct insta
{
char un[30];
char n[30];
char bio[40];
char mn[10];
struct insta *next;
}*start=NULL,*last=NULL;
typedef struct insta Node;
class Aic
{
public:
void add();
void del();
void update();
void search();
};
void Aic::add()
{
Node *q,*t;
t=(Node *)malloc(sizeof(Node));
cout<<"Enter the details :";
cout<<"\nEnter phone number";
cin>>t->mn;
cout<<"\nEnter user name";
cin>>t->un;
cout<<"\nEnter name";
cin>>t->n;
cout<<"\nEnter bio";
cin>>t->bio;
t->next=NULL;
if(start==NULL)
start=t;
else
{
q=start;
while(q->next!=NULL)
{
q=q->next;
}
q->next=t;
}
}
void Aic::del()
{
Node *ptr,*loc;
char x[30];
cout<<"Enter the account name to be deleted\n";
cin>>x;
ptr=start;
if(start==NULL)
{
cout<<"Account Not Found\n";
return;
}
else
{
while(ptr!=NULL)
{
if(strcmp(ptr->un,x)==0)
{
loc->next=ptr->next;
free(ptr);
return;
}
loc=ptr;
ptr=ptr->next;
}
}
}

void Aic::update()
{
Node *temp;
int c=1;
char u[30];
temp=start;
cout<<"Enter the account name to be updated\n";
cin>>u;
while(temp!=NULL)
{
if(strcmp(temp->un,u)!=0)
{
c++;
cout<<"\nAccount Not Found";
}
else
{
cout<<"Renter the details";
cout<<"\nEnter phone number";
cin>>temp->mn;
cout<<"\nEnter user name";
cin>>temp->un;
cout<<"\nEnter name";
cin>>temp->n;
cout<<"\nEnter bio";
cin>>temp->bio;

break;
}
temp=temp->next;
}
}

void Aic::search()
{
Node *temp;
int c=1;
char u[30];
temp=start;
cout<<"Enter the account name to be searched\n";
cin>>u;
while(temp!=NULL)
{
if(strcmp(temp->un,u)!=0)
{
c++;
cout<<"\nAccount Not Found";
}
else
{
cout<<"\n User name : "<<temp->un;
cout<<"\n Name : "<<temp->n;
cout<<"\n Bio : "<<temp->bio;
cout<<"\n Phone no. : " <<temp->mn;
break;
}
temp=temp->next;
}
}

void main()
{
Aic obj;
int g=0,c=0;
do
{
cout<<"Enter 1 to add account\n";
cout<<"Enter 2 to update account \n";
cout<<"Enter 3 to delete account \n";
cout<<"Enter 4 to search account\n";
cout<<"Enter 5 to exit\n " ;
cout<<"Enter your choice";
cin>>c;
switch(c)
{
case 1:
obj.add();
break;
case 2:
obj.update();
break;
case 3:
obj.del();
break;
case 4:
obj.search();
break;
case 5:
exit(0);

}
cout<<"\nEnter 1 to contine \ 0 to exit";
cin>>g;
}
while(g==1);
}
2.Wap to generate otp and verify it with the otp entered by user.

#include<iostream.h>
#include<time.h>
#include<stdlib.h>
#include<dos.h>
#include<string.h>
class Ot
{
public:
int uc1,uc2;
int gotp();
void ver();
};
int Ot::gotp()
{
int g;
srand(time(0));
return rand()%10000;
}
void Ot::ver()
{
int got=gotp();
int uotp;
time_t start=time(0);
cout<<"\nYour OTP :"<<got;
cout<<"\nEnter OTP: ";
cin>>uotp;
time_t current=time(0);
if(got==uotp)
{
if(difftime(current,start)<10)
cout<<"Login Succesfully...\n";
else
{
cout<<"OTP Expire\n";
cout<<"\nEnter 1 to Regenerate OTP\n Enter 2 to exit\n";
cin>>uc1;
if(uc1==1)
{
Ot::gotp();
Ot::ver();
}
else
exit(0);
}

}
else
{
cout<<"Incorrect OTP\n";
cout<<"\nEnter 1 to Regenerate OTP\n Enter 2 to exit\n";
cin>>uc2;
if(uc2==1)
{
Ot::gotp();
Ot::ver();
}
else
exit(0);
}

void main()
{
Ot obj;
obj.gotp();
obj.ver();
}
3.Password program.
#include <iostream.h>
#include <conio.h>
#include <stdlib.h>
#include<string.h>
void main()
{
struct info
{
char un[20];
char p[10];
}s={"Shruti","7809"};
char n[20];
char pass[5];
int i=0;
char a;
cout<<"Enter User Name : ";
cin>>n;
cout<<"\nEnter 4 digit Password : ";
for(i=0;i<4;)//infinite loop
{
a=getch();//stores char typed in a
if((a>='a'&&a<='z')||(a>='A'&&a<='Z')||(a>='0'&&a<='9')) //check if a is numeric or
alphabet
{
pass[i]=a;//stores a in pass
++i;
cout<<"*";
}
if(a=='\b'&&i>=1)//if user typed backspace
//i should be greater than 1.
{
cout<<"\b \b ";//rub the character behind the cursor.
--i;
}

if(a=='\r')//if enter is pressed

{
pass[i]='\0';//null means end of string.
break;//break the loop
}
}
cout<<"\nYou entered : "<<pass;
if((strcmp(s.p,pass)==0) && (strcmp(s.un,n)==0))
cout<<"\nYou login succesfully...\n" ;
else
cout<<"\n You entered wrong password...\n";
getch();
}
4.Bank Program to open account ,delete account, access account.
#include<iostream.h>
#include<stdio.h>
#include<string.h>
#include<conio.h>
#include<stdlib.h>
#include<time.h>
struct ban
{
long int acn;
int ag;
char nm[30],at[30];
float bal;
struct ban *next;
}*start=NULL,*last=NULL;;
class Bank
{
public:
void openacc();
void delacc();
};
void Bank::openacc()
{
struct ban *p;
p=(struct ban *)malloc(sizeof(struct ban *));
cout<<"\n Enter the Account Type (Savings or Current)";
cin>>p->at;
cout<<"\n Enter the Customer Name";
gets(p->nm);
cout<<"\n Enter the Age";
cin>>p->ag;
cout<<"\n Enter the Amount to be Deposited(Mininmum balance 1000)";
cin>>p->bal;
srand(time(0));
p->acn= (rand()%100000);
if(start==NULL)
{
start=last=p;
}
else
{
last->next=p;
last=p;
}
cout<<"Your " <<p->at <<" Account Number: "<<p->acn;
}
void Bank::delacc()
{
struct ban *ptr,*loc;
long int a;
char ty[20];
cout<<"\n Enter the Account Type";
gets(ty);
cout<<"\n Enter the Account Number that is to be deleted";
cin>>a;
ptr=start;
loc=NULL;
if(start==NULL)
{
cout<<"\n No Account Exist";
return;
}
else if(start->next==NULL)
{
if(ptr->acn==a)
{
start=last=NULL;
free(ptr);
cout<<"Your " <<ptr->at<< " got deleted";
return;
}
}
else
{
while(ptr!=NULL)
{
if(ptr->acn==a)
{
loc->next=ptr->next;
free(ptr);
cout<<"Your " <<ptr->at<< " account got deleted";
 return;
}
loc=ptr;
ptr=ptr->next;
}
}
}
class Savings:Bank
{

public:
void s_deposit();
void s_withdraw();
void s_balance();
};

void Savings::s_deposit()
{
struct ban *t;
float dp,i;
long int a;
t=start;
cout<<"\nEnter the Account NUmber";
cin>>a;
while(t!=NULL)
{
if(t->acn==a)
{
cout<<"\nEnter Deposit amount:";
cin>>dp;
t->bal=t->bal+dp;
i=(t->bal*2)/100;
t->bal=(t->bal)+i;
cout<<"\n Money Deposited";
return;
}
t=t->next;
}
}
void Savings::s_withdraw()
{
float wd;
long int a;
struct ban *t;
cout<<"\n Enter the Account Number";
cin>>a;
cout<<"\nEnter Withdrawl Amount";
cin>>wd;
t=start;
while(t!=NULL)
{
if(t->acn==a)
{
if(wd<t->bal && t->bal>1000)
{
t->bal=t->bal-wd;
cout<<"\n Balance Amount after withdrawing :"<<t->bal;
}
else
cout<<"\n Insufficient Balance";
}
t=t->next;
}
}
void Savings::s_balance()
{
struct ban *t;
long int a;
cout<<"\n Enter the Account Number :";
cin>>a;
t=start;
while(t!=NULL)
{
if(t->acn==a)
{
cout<<"Available Bal:"<<t->bal;
return;
}

t=t->next;
}
}
class Current:Bank
{
public:
void c_deposit();
void c_withdraw();
void c_balance();
};
void Current::c_deposit()
{
struct ban *t;
float dp;
long int a;
cout<<"\n Enter the Account Number ";
cin>>a;
cout<<"\nEnter the Deposit Amount";
cin>>dp;
t=start;
while(t!=NULL)
{
if(t->acn==a)
{
t->bal=(t->bal)+dp;
}
t=t->next;
}
}
void Current::c_withdraw()
{
struct ban *t;
float wd;
cout<<"\n Enter the Withdrwal Amount";
cin>>wd;
t=start;
while(t!=NULL)
{
if(wd<t->bal && t->bal>1000)
t->bal=(t->bal)-wd;
else
{
cout<<"\n Insufficient Balance";
return;
}
t=t->next;
}
}
void Current::c_balance()
{
struct ban *t;
long int a;
cout<<"\n Enter the Account Number :";
cin>>a;
t=start;
while(t!=NULL)
{
if(t->acn==a)
{
cout<<"Available Bal:"<<t->bal;
}
else
{
cout<<"\n Not found";
return;
}
t=t->next;
}
}
void main()
{
Bank ob;
Savings obj;
Current obj1;
char uc,ta;
int s,s1,c,i=0,lo;
do
{
top:
cout<<"\n Enter your choice : \n 1.Open Account \n 2.Delete Account \n 3.Access Account\n
4.Exit";
cin>>s;
switch(s)
{
case 1:

if(i<2)
{
ob.openacc();
i++;
}
else
{
cout<<"\n Account cannot be opened";
goto top;
}
break;
case 2:
ob.delacc();
i--;
break;
case 3:
cout<<"\n Enter your choice: \n S for Saving Account \n C for Currnt Accont";
cin>>uc;
if(uc=='S' || uc=='s')
{
cout<<"\n........SAVINGS ACCOUNT..........";
cout<<"\n Enter your choice : \n 1.Deposit \n 2.Withdrawal \n 3.Check Balance \n
4.Return to Main Menu";
cin>>s1;
switch(s1)
{
case 1:
obj.s_deposit();
break;
case 2:
obj.s_withdraw();
break;
case 3:
obj.s_balance();
break;
 case 4:
goto top;
default:
cout<<"\n Wrong Choice";
}
}
if(uc=='C' || uc=='c')
{
cout<<"\n............CURRENT ACCOUNT...........";
cout<<"\n Enter your choice : \n 1.Deposit \n 2.Withdrawal \n 3.Check Balance \n 4.Return
to Main Menu";
cin>>s1;
switch(s1)
{
case 1:
obj1.c_deposit();
break;
case 2:
obj1.c_withdraw();
break;
case 3:
obj1.c_balance();
break;
case 4:
goto top;
default:
cout<<"\n Wrong Choice";
}
break;
case 4:
cout<<"\n Thankyou for banking with us....";
exit(0);
default:
cout<<"\n Wrong Choice";
}
}

cout<<"\n Do you wish to continue?(enter 1 to continue /0 to exit)";

cin>>lo;

}
while(lo==1);
}
5.Shape Program.
#include<iostream.h>
#define pi 3.14
class Shape
{
public:
void disp(float r)
{
cout<<r<<" sq. unit";
}
};
class Rectangle:Shape
{
float l,b,a;
public:
Rectangle(float x,float y)
{
l=x;
b=y;
}
void rect()
{
a=l*b;
cout<<"\n Area of Rectangle : ";
Shape::disp(a);
}
};
class Square:Shape
{
float s,as;
public:
Square(float m)
{
s=m;
}
void squ()
{
as=s*s;
cout<<"\n Area of Square : ";
Shape::disp(as);
}
};
class Circle:Shape
{
float r,ac;
public:
Circle(float rad)
{
r=rad;
}
void circ()
{
ac=pi*r*r;
cout<<"\n Area of Circle : ";
Shape::disp(ac);
}
};
void main()
{
Rectangle obj(5.0,7.8);
obj.rect();
Square obj2(8.0);
obj2.squ();
Circle obj3(7.5);
obj3.circ();
}
6.Set operation using object passing.
#include<iostream.h>
class Set
{
public:
int a[10],b[20],i,j,k;
void inp();
void intersn(Set o1,Set o2);
void unio(Set o1,Set o2);
void minu(Set o1,Set o2);
};
void Set::inp()
{
cout<<"\n Enter the array :";
for(i=0;i<5;i++)
{
cin>>a[i];
}
}
void Set::intersn(Set o1,Set o2)
{
cout<<"\n Intersection";
for(i=0;i<5;i++)
{
for(j=0;j<5;j++)
{
if(o1.a[i]==o2.a[j])
{
cout<<o1.a[i]<<"\t";
}
}
}
}
void Set::unio(Set o1,Set o2)
{
int f=0,s=0;
j=0;
for(i=0;i<5;i++)
{
b[j]=o1.a[i];
j++;
}
for(i=0;i<5;i++)
{
for(k=0;k<5;k++)
{

if(o2.a[i]==o1.a[k])
{

f=1;
}
}
if(f!=1)
{
b[j]=o2.a[i];
j++;

}
f=0;
}
s=j;
cout<<"\n Union: ";
for(i=0;i<s;i++)
 {
cout<<b[i]<<"\t";
}

}
void Set::minu(Set o1,Set o2)
{
int f=0;
cout<<"\n A-B : ";
for(i=0;i<5;i++)
{
for(j=0;j<5;j++)
{
if(o1.a[i]==o2.a[j])
{
f=1;
}
}
if(f!=1)
{
cout<<o1.a[i]<<"\t";
}
f=0;
}
}
void main()
{
int ch;
Set obj1,obj2;
obj1.inp();
obj2.inp();
Set obj3;
cout<<"\n Enter 1 to find Union\n 2 to find intersection\n 3 to find A-B";
cin>>ch;
switch(ch)
{
case 1:
obj3.unio(obj1,obj2);
break;
case 2:
obj3.intersn(obj1,obj2);
break;
case 3:
obj3.minu(obj1,obj2);
break;
default:
cout<<"Wrong Choice";
}
}
7.Program to check whether the given string is Anagram or not.
#include<iostream.h>
#include<stdio.h>
int slen(char x[])
{
int c=0,i;
for(i=0;x[i]!=NULL;i++)
{
c++;
}
return c;
}
int main()
{
char str1[20], str2[20];
int len, len1, len2, i, j, found=0, not_found=0;
cout<<"Enter first string:\n";
cin>>str1;
cout<<"Enter second string:\n";
cin>>str2;
len1 = slen(str1);
len2 = slen(str2);
if(len1 == len2)
{
len = len1;
for(i=0; i<len; i++)
{
found = 0;
for(j=0; j<len; j++)
{
if(str1[i] == str2[j])
{
found = 1;
break;
}
}
if(found == 0)
{
not_found = 1;
break;
}
}
if(not_found == 1)
cout<<"\nStrings are not Anagram";
else
cout<<"\nStrings are Anagram";
}
else
cout<<"\nBoth string must contain same number of character to be an Anagram
Strings";
return 0;
}
8.Program to input 4*4 array & swap first and last row.
#include<iostream.h>
class Ar
{
int a[20][20],i,j;
public:
void get();
void arr();
};
void Ar::get()
{
cout<<"\nEnter 4*4 array";
for(i=0;i<4;i++)
{
for(j=0;j<4;j++)
{
cout<<"\n enter element for " << i <<" row "<< j <<" column";
cin>>a[i][j];
}
}
cout<<"\n enterd array\n";
for(i=0;i<4;i++)
{
for(j=0;j<4;j++)
{
cout<<a[i][j]<<"\t";
}
cout<<"\n";
}

}
void Ar::arr()
{
int t;
for(i=0;i<4;i++)
{
for(j=0;j<4;j++)
{
if(i==0)
{
t=a[i][j];
a[i][j]=a[i+3][j];
a[i+3][j]=t;
}
}
}
cout<<"\n After swapping\n";
for(i=0;i<4;i++)
{
for(j=0;j<4;j++)
{

cout<<a[i][j]<<"\t";
}
cout<<"\n";
}
}
void main()
{
Ar obj;
obj.get();
obj.arr();
}

9.Program to input 10 students name in an array & display only those students name whose
name starts with vowel and ends with consonant.
#include<iostream.h>
 #include<string.h>
#include<stdio.h>
class Qn
{
char nm[30][30];
int i,j;
public:
void get();
};
void Qn::get()
{
int l=0,k=0;
char f,e;
cout<<"\n Enter students name\n";
for(i=0;i<10;i++)
{
for(j=0;j<1;j++)
{
cout<<"enter " <<i+1<<"students name : ";
gets(nm[i]);
}
}
cout<<"names starting with vowel and ending with consonant are:\n";
for(i=0;i<10;i++)
{
for(j=0;j<1;j++)
{
l=strlen(nm[i]);
f=nm[i][0];
e=nm[i][l-1];
if((f=='a' || f=='e' || f=='i' || f=='o' || f=='u' || f=='A' || f=='E' || f=='I' || f=='O' || f=='U' ) && (e!
='a'&& e!='e' && e!='i' && e!='o' && e!='u' && e!='A' && e!='E' && e!='O' && e!='I' &&
e!='U'))
puts(nm[i]);
}
}
}
void main()
{
Qn obj;
obj.get();
}
10.Wap to input student name, roll number, address & show details of the student using copy
constructor.
#include<iostream.h>
#include<string.h>
#include<stdio.h>
class Ab
{
public:
long int rn;
char nm[20];
char add[35];
Ab(long int r,char n[],char a[])
{
rn=r;
strcpy(nm,n);
strcpy(add,a);
}
Ab(Ab &p)
{
rn=p.rn;
strcpy(nm,p.nm);
strcpy(add,p.add);
}
void put();
};
void Ab::put()
{
cout<<"Roll no : "<<rn<<"\n" <<"Students Name : "<<nm<<"\n"<<"Address : "<<add<<"\
n";
}
void main()
{
long int r;
char n[20],a[35];
cout<<"\n Enter roll no. : ";
cin>>r;
cout<<"\n Enter students name : ";
gets(n);
cout<<"\n Enter address : ";
gets(a);
Ab obj(r,n,a);
Ab obj2(obj);
cout<<"\n Using Copy Constructor \n";
obj2.put();
}
11.Program to make few Java/python built-in function.
#include<iostream.h>
#include<stdio.h>
#include<string.h>
class Az
{
public:
char s[30],c[30],sr[60];
int i,j,k;
void inp();
void substr(int ,int );
void substrd(int );
int indexo(char );
int lindex(char );
char chari(int );
void appends(char [],char []);
};
void Az::inp()
{
cout<<"Enter a string\n";
gets(s);
}

void Az::substr(int x,int y)

{
j=0;
for(i=x;i<y;i++)
{
c[j]=s[i];
j++;
}
c[j]=NULL;
for(i=0;c[i]!=NULL;i++)
{
cout<<c[i];
}
}
void Az::substrd(int x)
{
j=0;
for(i=x;s[i]!=NULL;i++)
{
c[j]=s[i];
j++;
}
c[j]=NULL;
for(i=0;c[i]!=NULL;i++)
{
cout<<c[i];
}
}
int Az::indexo(char z)
{
k=0;
for(i=0;s[i]!=NULL;i++)
{
if(s[i]==z)
{
k=i;
break;
}
}
return k;
}
int Az::lindex(char m)
{
k=0;
int l;
l=strlen(s);
for(i=l-1;i>=0;i--)
{
if(s[i]==m)
{
k=i;
break;
}
}
return k;
}
char Az::chari(int t)
{
char u;
for(i=0;s[i]!=NULL;i++)
{
if(i==t)
{
u=s[i];
break;
}
}
return u;
}
void Az::appends(char q[],char m[])
{
j=0;
for(i=0;q[i]!=NULL;i++)
{
sr[j]=q[i];
j++;
}
for(i=0;m[i]!=NULL;i++)
{
sr[j]=m[i];
j++;
}
sr[j]=NULL;
for(i=0;sr[i]!=NULL;i++)
{
cout<<sr[i];
}
}
void main()
{
int a,b,p,t,c,m=0;
char o,u;
char x[30],y[30];
Az obj;
cout<<"\nEnter your choice\n 1.substr()\n2.substrd()\n3.indexof()\n4.charat()\
n5.lastindexof()\n6.append()\n";
cin>>t;
do
{
switch(t)
{
case 1:
obj.inp();
cout<<"Enter the starting index for a substring\n";
cin>>a;
cout<<"Enter the last index for a substring\n";
cin>>b;
obj.substr(a,b);
break;
case 2:
obj.inp();
cout<<"Enter the starting index for a substring\n";
cin>>c;
obj.substrd(c);
break;
case 3:
obj.inp();
cout<<"Enter the character to find the index \n";
cin>>u;
obj.indexo(u);
break;
case 4:
obj.inp();
cout<<"Enter the index of the charcter to be displayed\n";
cin>>p;
cout<<obj.chari(p);
break;
case 5:
obj.inp();
cout<<"Enter the character to find the index from last \n";
cin>>o;
cout<<obj.lindex(o);
break;
case 6:
cout<<"\nEnter first string";
gets(x);
cout<<"\nEnter second string";
gets(y);
obj.appends(x,y);
break;
default:
cout<<"\nWrong Choice";
}
cout<<"\n Press 1 to continue\n 0 to exit";
cin>>m;
}
while(m==1);
}
12.Program to find the smallest and the largest word from the string .

#include <iostream.h>
#include <stdlib.h>
#include <stdio.h>
#include<string.h>

class Ls {
char sentence[40], word[20], largest[20],smallest[20];
int i;

public:
void large(char []);
void small(char []);
};

void Ls::large(char sentence[20]) {

int max = 0, count = 0, j = 0;

for (i = 0; sentence[i] != '\0'; i++) {

if (sentence[i] != ' ') {
word[j] = sentence[i];
j++;
if (sentence[i + 1] == '\0') {
word[j] = '\0';
count = strlen(word);
if (max < count) {
max = count;
strcpy(largest, word);
}
j = 0;
}
 }
else {
word[j] = '\0';
count = strlen(word);
if (max < count) {
max = count;
strcpy(largest, word);
}
j = 0;
}
}
cout << "The largest word is " << largest;
}

void Ls::small(char sentence[20])

{
int min = 1000, count = 0, j=0;

for (i = 0; sentence[i] != '\0'; i++) {

if (sentence[i] != ' ') {
word[j] = sentence[i];
j++;
if (sentence[i + 1] == '\0') {
word[j] = '\0';
count = strlen(word);
if (min>count) {
min = count;
strcpy(smallest, word);
}
j = 0;
}
}
else {
word[j] = '\0';
count = strlen(word);
if (min>count) {
min = count;
strcpy(smallest, word);
}
j = 0;
}
}
cout << "The smallest word is " << smallest;
}

int main()
{
char sen[20];
Ls obj;
 cout<<"\nEnter a sentence: ";
cin.getline(sen,20);

obj.large(sen);
cout<<"\n";
obj.small(sen);
return 0;
}