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Write a Object Oriented Program to Display Studnet Information

// Write a Object Oriented Program to Display Studnet Information

#include<iostream>
#include<stdio.h>
#include<cstdlib>
#include<conio.h>
#include<iomanip>
#include<cstring>
using namespace std;

class student
{
public:

char first_name[50], last_name[50];
int roll;
float ban_mark,eng_mark,mat_mark;

};

int main()
{

student infor;

char option, select;


FILE *fp;
fp=fopen("users.txt","rb+");

if (fp == NULL)
{
fp = fopen("users.txt","wb+");

return 0;

}


while(1)
{

system("cls");
cout << "\n\n";
cout << "\t\t****** INFORMATION OF STUDENTS ******";
cout << "\n\n";
cout << "\n \t\t 1. Add Students";
cout << "\n \t\t 2. Show Records";
cout << "\n \t\t 3. Exit";
cout << "\n\n";
cout <<"\t Select What you want:> infor.first_name;
cout << "Last Name : ";
cin >> infor.last_name;
cout << "Roll No : ";
cin >> infor.roll;
cout << "Marks of Bangla : ";
cin >> infor.ban_mark;
cout << "Marks of English : ";
cin >> infor.eng_mark;
cout << "Marks of Mathmetic : ";
cin >> infor.mat_mark;

fwrite(&infor,sizeof(infor),1,fp);
cout << "\n Add Another Record (Y/N) ";
fflush(stdin);
option = getchar();
}
break;
case '2':
system("cls");
rewind(fp);
cout << "=== View the Records in the Database ===";
cout << "\n";
while (fread(&infor,sizeof(infor),1,fp) == 1)
{
cout << "\n";
cout <<"\t Name of Students : "<< infor.first_name << setw(5)<< infor.last_name;
cout << "\n";
cout <<"\t Roll No : " <<infor.roll;
cout << "\n";
cout <<"\t Bangla : " <<infor.ban_mark;
cout << "\n";
cout << "\t English : " <<infor.eng_mark;
cout << "\n";
cout <<"\t Mathmetics : " <<infor.mat_mark<<endl;
cout<<"\t" <<endl<<"================================="<<endl;
}
cout << "\n\n";
system("pause");
break;

case '3':
system("cls");
fclose(fp);
cout << "\n\n";
cout << "\t\t********************************************************"<<endl;
cout << "\t\t* THANKS BY MD.HASMOT HOSSEN. *"<<endl;
cout << "\t\t********************************************************"<<endl;
cout << "\n\n";
exit(0);
}
}

system("pause");
return 0;
}

Write a program calculate square and cube of given number using inheritance

// write a program calculate square and cube of given number using inheritance

#include<iostream>
using namespace std;
//using by inheritence

class hasmot_cal
{

public:
int a,b,output;
void setnub1(int a)
{
 nub1=a;
}

void setnub2( int b)
{
 nub2=b;
}
protected:
   int nub1=a;
   int nub2=b;
};

class addition:public hasmot_cal
{

public:
void ad()
{
int a,b;
cout<<"\n \n"<<"enter your addition digit?";
cin>>a>>b;
output=a+b;
cout<<""<<"your addition output = "<<" "<<output<<endl;
}
};


class Subtraction:public hasmot_cal
{
public:
void su()
{
int a,b;
cout<<"\n \n"<<"enter your Subtraction digit?";
cin>>a>>b;
output=a-b;
cout<<""<<"your Subtraction output = "<<" "<<output<<endl;
}
};

int main()
{
hasmot_cal ajaira;
addition ss;
ss.ad();
Subtraction pp;
pp.su();

return 0;
};

Write a program calculate square and cube of given number using constractor

// write a program calculate square and cube of given number using constractor
#include<iostream>
using namespace std;
class ac
{
public:
int n;
ac();
~ac();
void sq();
void cb();
};
ac::ac()
{
cout<<"Enter the number : ";
cin>>n;
}
ac::~ac()
{
cout<<""<<endl;
}
void ac::sq()
{
cout<<" The value of square is : "<<n*n;
}
void ac::cb()
{
cout<<" The value of cube is : "<<n*n*n;
}

int main()
{
ac sss;
sss.sq();
cout<<endl;
sss.cb();
//return 0;
}

Write a program calculate square and cube of given number using polymafaiom

//write a program calculate square and cube of given number using polymafaiom
#include<iostream>
using namespace std;

class sc
{
public:
void setnum(int n)
{
number=n;
}
protected: int number;
};

class square: public sc
{

public:
int re;
void sq()
{
re=number*number;
cout<<"The result of sq : "<<re;
}

};
class cube: public sc
{

public:
int re;
void cub()
{
re=number*number*number;
cout<<"The result of cube : "<<re;
}

};

int main()
{
int n;
square s;
cube cb;
sc *p1=&s;
sc *p2=&cb;
cout<<"Enter the number ofr sq: ";
cin>>n;
p1->setnum(n);
s.sq();
cout<<"\n\nEnter the number for cube: ";
cin>>n;
p2->setnum(n);
cb.cub();
return 0;
}

Write a program calculate square and cube of given number using inheritance

// write a program calculate square and cube of given number using inheritance

#include<iostream>
using namespace std;
//using by inheritence

class hasmot_cal
{
public:
int a,b,output;
void setnub1(int a)
{
 nub1=a;
}

void setnub2( int b)
{
 nub2=b;
}
protected:
   int nub1=a;
   int nub2=b;
};

class addition:public hasmot_cal
{
public:
void ad()
{
int a,b;
cout<<"\n \n"<<"enter your addition digit?";
cin>>a>>b;
output=a+b;
cout<<""<<"your addition output = "<<" "<<output<<endl;
}
};


class Subtraction:public hasmot_cal
{
public:
void su()
{
int a,b;
cout<<"\n \n"<<"enter your Subtraction digit?";
cin>>a>>b;
output=a-b;
cout<<""<<"your Subtraction output = "<<" "<<output<<endl;
}
};

int main()
{
hasmot_cal ajaira;
addition ss;
ss.ad();
Subtraction pp;
pp.su();

return 0;
};

Write a program Check Whether the given number is Strange or Not

//write a program Check Whether the given number is Strange or Not.

#include<iostream>
using namespace std;
//base class
class strange
{
public:
void setdigit(int d)
{
digit=d;
}
protected:
int digit;
};
//derived class
class number : public strange
{
public:
int i,j,t=1,d;
int devide()
{
while(d!=0)
{
j=d%10;
d=d/10;
for(i=2;i<j;i++)
{
if(j%i==0)
{
t=0;
i=j;
}
}
}
}
int check()
{
if(t==1)
cout<<"number is strange";
else
cout<<"number is not strange";
}
};
int main()
{
number hh;
int a;
cin>>a;
hh.setdigit(a);
hh.check();
}