Structures – Student Data

#include <iostream.h>
#include <conio.h>
#include <stdio.h>
#include <string.h>
#include <iomanip.h>

struct date
{
int dd, mm, yy;
};

struct points
{
int sub1, sub2, sub3;
float avg;
};

struct student
{
int rno;
char name[50], stream[50];
date dob;
points marks;
} s[10], stud[10];

int average (student s[10])
{
int flag = 0;
cout<<endl<<“Displaying student data”<<endl;
for (int i=0; i<10; i++)
{
cout<<endl<<“Data for student number “<<i+1<<endl;
cout<<“Student roll number : “<<setw(50)<<s[i].rno<<endl;
cout<<“Student name : “<<setw(50)<<s[i].name<<endl;
cout<<“Student date of birth : “<<setw(50)<<s[i].dob.dd<<” “
<<s[i].dob.mm<<“ “<<s[i].dob.yy<<endl;
cout<<“Student stream : “<<setw(50)<<s[i].stream<<endl;
cout<<“Student marks in subject 1”<<setw(50)<<s[i].marks.sub1<<endl;
cout<<“Student marks in subject 2”<<setw(50)<<s[i].marks.sub2<<endl;
cout<<“Student marks in subject 3”<<setw(50)<<s[i].marks.sub3<<endl;
s[i].marks.avg = (s[i].marks.sub1 + s[i].marks.sub2 + s[i].marks.sub3)/3;
cout<<“Average marks of student in 3 subjects : “<<setw(50)
<<s[i].marks.avg<<endl;
if (s[i].marks.avg < 120)
flag++;
}
return flag;
}

void studstream (student s[10])
{
int j=1;
char find[50];
cout<<endl<<“Enter stream to be searched for : “;
gets(find);
cout<<endl<<“Displaying data for students of requested stream”<<endl;
for (int i=0; i<10; i++)
{
if (strcmp (s[i].stream, find) == 1)
{
cout<<endl<<“Data of student “<<j<<” meeting required criteria”<<endl;
cout<<“Student roll number : “<<setw(50)<<s[i].rno<<endl;
cout<<“Student name : “<<setw(50)<<s[i].name<<endl;
cout<<“Student date of birth : “<<setw(50)<<s[i].dob.dd<<“ “
<<s[i].dob.mm<<“ “<<s[i].dob.yy<<endl;
cout<<“Student stream : “<<setw(50)<<s[i].stream<<endl;
cout<<“Student marks in subject 1 : “<<setw(50)<<s[i].marks.sub1<<endl;
cout<<“Student marks in subject 2 : “<<setw(50)<<s[i]
.marks.sub2<<endl;
cout<<“Student marks in subject 3 : “<<setw(50)<<s[i].marks.sub3<<endl;
s[i].marks.avg = (s[i].marks.sub1 + s[i].marks.sub2 + s[i].marks.sub3)/3;
cout<<“Average marks of student in 3 subjects : “
<<setw(50)<<s[i].marks.avg<<endl;
j++;
}
}
}

void studdob (student s[10])
{
int j=1;
date find;
cout<<endl<<“Enter date of birth to search for in DD MM YYYY format : “;
cin>>find.dd>>find.mm>>find.yy;
cout<<endl<<“Displaying data for students of requested date of birth”<<endl;
for (int i=0; i<10; i++)
{
if ((s[i].dob.dd == find.dd) && (s[i].dob.mm == find.mm) && (s[i].dob.yy == find.yy))
{
cout<<endl<<“Data of student “<<j<<” meeting required criteria”<<endl;
cout<<“Student roll number : “<<setw(50)<<s[i].rno<<endl;
cout<<“Student name : “<<setw(50)<<s[i].name<<endl;
cout<<“Student date of birth : “<<setw(50)<<s[i].dob.dd<<“ “ <<s[i].dob.mm<<“ “<<s[i].dob.yy<<endl;
cout<<“Student stream : “<<setw(50)<<s[i].stream<<endl;
cout<<“Student marks in subject 1 : “<<setw(50)<<s[i].marks.sub1<<endl;
cout<<“Student marks in subject 2 : “<<setw(50)<<s[i].marks.sub2<<endl;
cout<<“Student marks in subject 3 :”<<setw(50)<<s[i].marks.sub3<<endl;
s[i].marks.avg = (s[i].marks.sub1 + s[i].marks.sub2 + s[i].marks.sub3)/3;
cout<<“Average marks of student in 3 subjects : “ <<setw(50)<<s[i].marks.avg<<endl;
j++;
}
}
}

void main()
{
clrscr();
cout<<“Creating database for 10 students”<<endl;
for (int i=0; i<10; i++)
{
cout<<endl<<“Enter data for student “<<i+1<<endl<<“Enter student
roll number : “;
cin>>stud[i].rno;
cout<<“Enter student name : “;
gets(stud[i].name);
cout<<“Enter student date of birth in DD MM YYYY format : “;
cin>>stud[i].dob.dd>>stud[i].dob.mm>>stud[i].dob.yy;
cout<<“Enter student stream : “;
gets(stud[i].stream);
cout<<“Enter student marks in subject 1 : “;
cin>>stud[i].marks.sub1;
cout<<“Enter student marks in subject 2 : “;
cin>>stud[i].marks.sub2;
cout<<“Enter student marks in subject 3 : “;
cin>>stud[i].marks.sub3;
}
int ch;
cout<<endl<<“Program Menu”<<endl
<<“1. Calculate average marks for each student and print student details”
<<endl<<“2. Search by stream”<<endl<<“3. Search by date of birth”
<<endl<<“Enter your choice : “;
cin>>ch;
switch (ch)
{
case 1 : int fail;
fail = average (stud);
cout<<endl<<“Number of students failed is “<<fail;
break;
case 2 : studstream (stud);
break;
case 3 : studdob (stud);
break;
default : cout<<endl<<“You entered an incorrect choice”;
}
cout<<endl;
getch();
}