String to Char Array and Char Array to String Conversion in C++ Simple Approch

#include<bits/stdc++.h>
#include<stdio.h>
using namespace std;
int main()
{
char s[]="stringwith-hyphen";
int size=sizeof(s)/sizeof(s[0]);
char ch[size];
int j=0;
for(int i=0;i<size;i++)
{
if(s[i]=='-')
ch[j++]=s[i];
}
for(int i=0;i<size;i++)
{
if(s[i]!='-')
ch[j++]=s[i];
}
for(int i=0;i<size;i++)
s[i]=ch[i];

// Char Array to String conversion using constructor
// Method 1

string s1(s);

// Method 2

string s2="";
for(int i=0;i<size;i++)
s2+=s[i];
printf("%s\n",s);
cout<<s2;


}

Pizza Hut Management System Project in C++

//This Program Is Created By Mohd Mujtaba Section-K1613 Roll No-B47 Reg No-11608125

//*******************************PROGRAM STARTS FROM HERE*********************************************
#include<iostream> // can be remove when using fstream
#include<fstream>
#include<conio.h> // getch()
#include<stdio.h> // gets,puts, 
#include<stdlib.h> // system("cls") system("PAUSE") exit() remove() rename()
#include<string.h> // strcpy strlen strcmp etc..
#include<iomanip>
#include<windows.h>   //Sleep()
#include<bits/stdc++.h>

using namespace std;

HANDLE console = GetStdHandle(STD_OUTPUT_HANDLE); // used for goto
COORD CursorPosition; 

void gotoxy(int x,int y)
{
CursorPosition.X=x;
CursorPosition.Y=y;
SetConsoleCursorPosition(console,CursorPosition); 

}

using namespace std;
fstream f1;
fstream f2;
fstream f3;
fstream f4;


int i,temp,found=0,total=0;
char chop='y';
int i_code1;



class menu
{
protected:
float price;
char p_name[20];
public:
int i_code;
void get_menu();
void show_menu();
void delPizzaMenu();
};
class order: public menu
{
protected:
char name[30],add[80];
int bill_no,i_code2;
long long mbno;
public:
void modify();

void get_order();
void show_order();
void gen_bill(int,int);
void search();
void del_rec();

};

class lovely_pizza:public order
{
public:




void home_page()
{

int menuch=1;
bool value=true;
int x=7;
// MENU:



while(value)
{
system("cls");
gotoxy(14,x);
cout<<"->";
system("color 1A");
gotoxy(18,1);
cout<<setw(30)<<"             ==================================================";
gotoxy(18,2);
// Sleep(150);
cout<<setw(30)<<"                      WELCOME TO LOVELY PIZZA PVT. LTD. ";
gotoxy(18,4);
// Sleep(150);
cout<<setw(30)<<"                               PHAGWARA PUNJAB";
gotoxy(18,5);
// Sleep(150);
cout<<setw(30)<<"            ===================================================";
gotoxy(18,6);
// Sleep(100);
gotoxy(18,7);
cout<<"1. NEW ORDER:";
gotoxy(18,8);
cout<<"2. ALL ORDER DETAILS:";
gotoxy(18,9);
cout<<"3. SEARCH ORDER";
gotoxy(18,10);
cout<<"4. Modify ORDER:";
gotoxy(18,11);
cout<<"5. Delete ORDER :";
gotoxy(18,12);
cout<<"6. Enter Pizza Menu Details:";
gotoxy(18,13);
cout<<"7. Show Pizza  MENU:";
gotoxy(18,14);
cout<<"8. Delete Pizza Details:";
gotoxy(18,15);
cout<<"9. Exit (Sign Out):";
gotoxy(18,16);
cout<<"Choose One Option...... :";
system("pause>nul"); // the >nul bit causes it the print no message

if(GetAsyncKeyState(VK_DOWN) && x != 16)
{
gotoxy(14,x);
cout<<"  ";
x++;
cout<<"->";
menuch++;
continue;
}
if(GetAsyncKeyState(VK_UP)&&x!=7)
{
gotoxy(14,x);
cout<<"  ";
x--;
cout<<"->";
menuch--;
continue;
}
if(GetAsyncKeyState(VK_RETURN))
{

switch(menuch)
{
case 1:
system("cls");

get_order();
// goto MENU; // REDIRECTED TO MENU LABEL
break;
case 2:
system("cls");
f2.open("D:/order.txt",ios::in|ios::out|ios::app);
show_order();
// goto MENU; // REDIRECTED TO MENU LABEL
break;
case 3:
search();
cout<<"Press Again Any Key...#BACK #TO #MENU:";
getch();
// goto MENU; // REDIRECTED TO MENU LABEL
break;
case 4:
system("cls");
modify();
// goto MENU; // REDIRECTED TO MENU LABEL
break;
    case 5:
    del_rec();
// goto MENU; // REDIRECTED TO MENU LABEL
break;
     
case 6:

        f1.open("D:\\menu.txt",ios::out|ios::app);
    get_menu();
f1.close();
// goto MENU; // REDIRECTED TO MENU LABEL
break;
case 7:
system("cls");
    f1.open("D:/menu.txt");
    show_menu();
    f1.close();
    getch();
    // goto MENU; // REDIRECTED TO MENU LABEL
    break;
case 8:
delPizzaMenu();
// goto MENU; // REDIRECTED TO MENU LABEL
break;
case 9:
system("cls");

for(i=0;i<50;i++)
{

cout<<"/";
if(i==26)
cout<<"Saving And Exiting.....:";
Sleep(30);
}

exit(42);
value=false;

}
}
}
gotoxy(18,19);
}

}pizza;

void menu::get_menu()
{
system("color 2F");
do
{
system("cls");
cout<<setw(30)<<"Enter All Pizza DETAILS With PRICES:\n\n";
cout<<"Enter Item Code:";
fflush(stdin);
    
cin>>i_code;
cout<<"Pizza Name;";
fflush(stdin);
gets(p_name);
cout<<"Price:";
cin>>price;
f1.write((char*)&pizza,sizeof(pizza));
system("cls");
cout<<"Record Entered.......\n"<<setw(15)<<"Want To Enter Any More (Y/N):";
cin>>chop;

}while(chop=='y'||chop=='Y');
}

void menu::show_menu()
{
system("color 1A");
cout<<"Item_Code"<<setw(18)<<"Name"<<setw(25)<<"Price"<<"\n";
while(f1.read((char*)&pizza,sizeof(pizza)))
cout<<i_code<<setw(25)<<p_name<<setw(20)<<price<<"\n";
}

void order::modify()
{
MODIFY:
found=0;
int mbno1,x;
char cnfModify;
cout<<"Enter Mobile_No:";
cin>>mbno1;
f2.open("D:\\order.txt",ios::in|ios::out|ios::app);
f3.open("D:\\order1.txt",ios::in|ios::out|ios::app);


cout<<"Bill_No:"<<setw(10)<<"Name"<<setw(20)<<"Address"<<setw(20)<<"Mobile No"<<setw(20)<<"Pizza Code"<<"\n";
while(f2.read((char*)&pizza,sizeof(pizza)))
{
if(mbno1==mbno)
{
cout<<bill_no<<setw(20)<<name<<setw(20)<<add<<setw(15)<<mbno<<setw(20)<<i_code2<<"\n";
//
//
cout<<"\nWant To Modify This:(Y/y):";
fflush(stdin);
cin>>cnfModify;
fflush(stdin);
if(cnfModify=='y'||cnfModify=='Y')
{
cout<<"\nEnter New Pizza Code:";
cin>>i_code2;

}
f3.write((char*)&pizza,sizeof(pizza));
found=1;
}


}
if(found==0)
{
cout<<"File Not Found!!! ENTER AGAIN::";
system("PAUSE");
f2.close();
    f3.close();
goto MODIFY;
}

f2.close();
f3.close();



f2.open("D:\\order.txt",ios::in|ios::out|ios::app);
f3.open("D:\\order1.txt",ios::in|ios::out|ios::app);
while(f2.read((char*)&pizza,sizeof(pizza)))
{
if(mbno1==mbno)
continue;
else
f3.write((char*)&pizza,sizeof(pizza));
}
f2.close();
f3.close();
remove("D://order.txt");
rename("D://order1.txt","D://order.txt");

cout<<"\n\n Record Updated!! Press Any Key For MENU";
getch();
}

void order::get_order()
{
    int x,tempBillCount=0;
char ch;
f2.open("D:\\order.txt",ios::out|ios::in|ios::app);
while(f2.read((char*)&pizza,sizeof(pizza)))
{
tempBillCount++;

}
f2.close();
f2.open("D:\\order.txt",ios::out|ios::in|ios::app);
bill_no=tempBillCount+1;
cout<<"Enter Name:";
fflush(stdin);
gets(name);
cout<<"Enter Address:";
fflush(stdin);
gets(add);
cout<<"Enter Mobile Number:";
cin>>mbno;
fflush(stdin);

AGAIN:                   //GOTO STATEMENT

cout<<"Enter Pizza(ITEM) Code:";
fflush(stdin);
cin>>i_code2;  

f2.write((char*)&pizza,sizeof(pizza));    //storing The Data of Only Pizza Menu And That is also of last menu
  cout<<"Do You Want To Enter More:";
cin>>ch;
if(ch=='y'||ch=='Y')
goto AGAIN; // goto to again LABEL
f2.close();
gen_bill(mbno,bill_no);
getch();                 //its just like printing the bill after order;

       
}
void order::show_order()
{
system("Color 5F");
int x;
// f1.open("D:\\menu.txt",ios::in|ios::out|ios::app);
cout<<"Bill_No:"<<setw(10)<<"Name"<<setw(20)<<"Address"<<setw(20)<<"Mobile No"<<setw(20)<<"Pizza Code"<<"\n\n";
while(f2.read((char*)&pizza,sizeof(pizza)))
{
cout<<bill_no<<setw(20)<<name<<setw(20)<<add<<setw(15)<<mbno<<setw(20)<<i_code2<<"\n";
x=i_code2;
fflush(stdin);
//cout<<"\nItem_Code"<<setw(18)<<"Pizza Name"<<setw(25)<<"Price"<<"\n\n";
// cout<<i_code2<<setw(25)<<p_name<<setw(20)<<price<<"\n";


}
getch();

f2.close();

/* while(f1.read((char*)&pizza,sizeof(pizza)));
{
if(x==i_code)
{

cout<<"\nItem_Code"<<setw(18)<<"Pizza Name"<<setw(25)<<"Price"<<"\n\n";
cout<<i_code<<setw(25)<<p_name<<setw(20)<<price<<"\n";
cout<<"\n\n\n\n\n\n\n"<<setw(50)<<"Amount-->RS "<<total;
}
f1.close();


} */

}

void order::gen_bill(int a, int tempBillNo)
{
system("color 1A");
int i_bill;
float total=0;

system("cls");
cout<<setw(80)<<"_______________________________________\n";
cout<<setw(80)<<"|=====================================|\n";
cout<<setw(80)<<"|          LOVELY PIZZA PVT. LTD      |\n";
cout<<setw(80)<<"|                                     |\n";
cout<<setw(80)<<"|       Jalandhar-Phagwara Highway    |\n";
cout<<setw(80)<<"|             Chehru -Punjab          |\n";
cout<<setw(82)<<"|=====================================|\n\n\n";

cout<<"Customer Name:"<<name<<"\t\tBill No:"<<tempBillNo;
cout<<"\nAddress:"<<add;
cout<<"\nContact No:"<<mbno;
//f1.open("D:\\menu.txt",ios::in|ios::out|ios::app);
f2.open("D:\\order.txt",ios::in|ios::out|ios::app);
cout<<"\n===================================================================\n";
cout<<"\n===================================================================\n";
cout<<"\n\nItem_Code"<<setw(18)<<"Pizza Name"<<setw(25)<<"Price"<<"\n\n";
while(f2.read((char*)&pizza,sizeof(pizza)))
{
if(a==mbno)
{
i_bill=i_code2;

f1.open("D:\\menu.txt",ios::in|ios::out|ios::app);
while(f1.read((char*)&pizza,sizeof(pizza)))
{
if(i_bill==i_code)
{
cout<<i_code<<setw(25)<<p_name<<setw(20)<<price<<"\n";
total+=price;
break;
}

}
f1.close();
}
    }
    cout<<"\n\n"<<setw(40)<<"TOTAL COST FOR ORDER IS RS:"<<total<<"\n";
    cout<<setw(50)<<"THANK YOU! AND VISIT AGAIN:\n";
//f1.close();
f2.close();
}

void order::search()
{
  system("Color 2F");
 
long b;
  float total=0;

  Back: //goto function to move back and search again.....

  system("cls");
  found=0;
cout<<"Enter Mobile_No To Be Searched: \n"<<setw(10)<<"Enter 99 Any time When You Wish To go Back(MENU): ";
cin>>b;
f2.open("D:\\order.txt",ios::in|ios::out|ios::app);
while(f2.read((char*)&pizza,sizeof(pizza)))
{
if(b==mbno)
{
cout<<"\n\nCustomer Name:"<<name;
cout<<"\nAddress:"<<add;
cout<<"\nContact No:"<<mbno;
found=1;
break;
}
}
f2.close();
if(found==1)
{
cout<<"\n\nItem_Code"<<setw(18)<<"Pizza Name"<<setw(25)<<"Price"<<"\n\n";
f2.open("D:\\order.txt",ios::in|ios::out|ios::app);
// f2.seekp(0,ios::beg);
while(f2.read((char*)&pizza,sizeof(pizza)))
{
if(b==mbno)
{
temp=i_code2;

f1.open("D:\\menu.txt",ios::in|ios::out|ios::app);
while(f1.read((char*)&pizza,sizeof(pizza)))
{
if(temp==i_code)
{
cout<<i_code<<setw(25)<<p_name<<setw(20)<<price<<"\n";
total+=price;
break;
}

}
f1.close();
}
}
cout<<"\n\n"<<setw(20)<<"TOTAL COST FOR PIZZA IZZ RS:"<<total<<"\n";
}


if (found==0)
{
    if(b==99)
    goto MENU;
system("cls");
cout<<"File/Record Not Found!!\n Press any key to enter again.....";
getch();
goto Back;
}

MENU:
f1.close();
f2.close();
}


void order::del_rec()
{
system("color 7C");
searchAgain:             //GOTO STATEMENT 
found=0;
long long x;
char ch;

cout<<"Enter Mobile Number:"<<setw(10)<<"(ENTER 99 ANY TIME #TO #GO #BACK::)";
cin>>x;
f2.open("D://order.txt",ios::in|ios::out|ios::app);
while(f2.read((char*)&pizza,sizeof(pizza)))
{
if(x==mbno)
{
cout<<"\n\nCustomer Name:"<<name;
cout<<"\nAddress:"<<add;
cout<<"\nContact No:"<<mbno;
temp=i_code2;
found=1;
}
}
f2.close();
if (found==0)
{
    if(x==99)
    goto MENU;
system("cls");
cout<<"File/Record Not Found!!\n Press any key to enter again.....";
getch();
goto searchAgain;
}

if(found==1)
cout<<"\n\nItem_Code"<<setw(18)<<"Pizza Name"<<setw(25)<<"Price"<<"\n\n";
f1.open("D:\\menu.txt",ios::in|ios::out|ios::app);

while(f1.read((char*)&pizza,sizeof(pizza)))
{
if(temp==i_code)
{
cout<<i_code<<setw(25)<<p_name<<setw(20)<<price<<"\n";

}


}
     // MENU LOCAL GOTO Object;

f1.close();
MENU:  

f2.open("D://order.txt",ios::in);
f3.open("D://order1.txt",ios::in|ios::out|ios::app);
while(f2.read((char*)&pizza,sizeof(pizza)))
{
if(x==mbno)
continue;
f3.write((char*)&pizza,sizeof(pizza));
}
f2.close();
f3.close();
remove("D://order.txt");
rename("D://order1.txt","D://order.txt");






}

void menu::delPizzaMenu()
{
system("color 5F");
int tempIcode;
found=0;
f1.open("D://menu.txt",ios::in|ios::out|ios::app);
delPizzaMenu:
cout<<"Enter Pizza Code:";
cin>>tempIcode;
while(f1.read((char*)&pizza,sizeof(pizza)))
{
if(tempIcode==i_code)
{
cout<<i_code<<setw(25)<<p_name<<setw(20)<<price<<"\n";
found=1;
}
}
f1.close();
if(found!=1)
{
if(tempIcode==99)
goto delPizzaMenu1;
cout<<"Required Data Is Not Found!!!,\n   PRESS ANY KEY TO ENTER AGAIN(ENTER 99 To GO BACK):\n";
getch();
goto delPizzaMenu;
}


f1.open("D://menu.txt",ios::in);
f4.open("D://menu1.txt",ios::in|ios::out|ios::app);
delPizzaMenu1: // goto function
while(f1.read((char*)&pizza,sizeof(pizza)))
{
if(tempIcode==i_code)
continue;
f4.write((char*)&pizza,sizeof(pizza));
}
f1.close();
f4.close();
remove("D://menu.txt");
rename("D://menu1.txt","D://menu.txt");


}




main()
{
system("Color 6B");
char pass[256] = {0},c;
    char pass1[] = "mujtaba1@";
    int pos = 0,count=0;
    Sleep(300);
    cout<<setw(30)<<"               ============================================\n";
    Sleep(300);
    cout<<setw(45)<<"                           PIZZA MANAGEMENT SYSTEM\n";
    Sleep(300);
    cout<<setw(45)<<"                         CREATED BY- MOHAMMAD MUJTABA\n";
    Sleep(300);
    cout<<setw(45)<<"                               SECTION - K1613\n";
    Sleep(300);
    cout<<setw(45)<<"                                ROLL NO- B47\n";
    Sleep(300);
    cout<<setw(30)<<"               =============================================\n";
    Sleep(300);
    cout<<setw(30)<<"               =============================================\n";
    Sleep(300);
    cout<<setw(30)<<"                          LOGIN INTERFACE (AUTHORIZED)\n";
    Sleep(300);
    cout<<setw(30)<<"               =============================================\n\n";
    Sleep(300);
    login:  // GOTO FUNCTION
    
    cout<<"\nEnter Password (Max 3 attempts) : ";
    
    do {
        c = getch();

        if( isprint(c) ) 
        {
            pass[ pos++ ] = c;
            cout<<'*';
        }
        else if( c == 8 && pos )
        {
            pass[ pos-- ] = '\0';
            cout<<"\b\b";
            
        }
    } while( c != 13 );
    
    system("cls");
    cout<<"Please Wait System Is Verifing data";
    for(i=0;i<40;i++)
    {
    Sleep(59);
    cout<<"_";
}

    if( !strcmp(pass,pass1) )
        {
        system("cls");
        cout<<setw(40)<<"                  PLEASE WAIT WHILE PROGRAM IS LOADING>>\n";
            for(i=0;i<40;i++)
     {
cout<<"/\\";
Sleep(50);

            }
        }
    else
        {
  cout<<"\n Wrong Password!!!\n PRESS ANY KEY & TRY AGAIN";
  getch();
  count++;
  if(count==3)
  exit(42);
  else 
  goto login;
 }
pizza.home_page();
}

Program to find K' th smallest number in Array In C,C++

#include<iostream>
using namespace std;

main()
{
int n,t,k;
cout<<"Enter No Of Testcases:";
cin>>t;
cout<<"Enter Number Of Elements:";
cin>>n
cout<<"Enter K'th Number To be finded:";
cin>>k;
int a[n],count=0,i,j,countb=0;
int b[n],p,q;
for(q=0;q<t;q++)
{
for(p=0;p<n;p++)
{
    cin>>a[p];
}

for(i=0;i<6;i++)
{
count=0;

int temp=a[i];
for(j=0;j<6;j++)
{
if(temp==a[j])
count++;

}
if(count==k)
{
b[i]=a[i];
countb++;
}
}
int small=b[0];
for(i=0;i<countb;i++)
{
if(small>b[i])
small=b[i];
}
cout<<"K'th Smallest Number Is:"<<small;

}

}

Enumeration Example

#include<iostream>
using namespace std;
main()
{
enum{ jan=1,feb,m,a,ma,ju,jul,au,sep,oct,nov,december };//Enumeration Variables
cout<<december;
}/*If We do not Initialize the Value of Enum Then By default value is 0 ..Then Jan will start from 0 and print 11 for december month */

Addition Of String without using strcat() function in C++

#include<iostream>
#include<stdio.h>
#include<string.h>
using namespace std;
main()
{
char n[20],s[50];
int i,j=0,len;
gets(n);
gets(s);
len=strlen(n);
for(i=len;s[j]!='\0';i++)
{
n[i]=s[j];
j++;
}
puts(n);

}