Progress Report

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 //Downloaded From www.c4cpp.co.nr 
//(C)2009.All rights reserved. 
#include<iostream.h> 
#include<conio.h> 
#include<dos.h> 
#include<stdio.h> 
#include<fstream.h> 
struct stud 
{ 
public: 
int rno; 
char name[50]; 
int cls; 
float marks[5]; 
}; 
struct res 
{ 
int rnos; 
float total; 
char grade; 
float perc; 
}; 
void main() 
{ 
clrscr(); 
float tm; 
int i,ma; 
stud st; 
res rt; 
ofstream gpj("stud.dat",ios::binary|ios::trunc); 
ofstream jpg("result.dat",ios::binary|ios::trunc); 
if(!gpj||!jpg) 
cout<<"File Cannot Be Created"<<endl; 
int n; 
if(gpj&&jpg) 
{ 
cout<<"How mamy Students U Want to Enter ???? "<<endl; 
cin>>n; 
for(i=0;i<n;i++) 
{ 
cout<<"Enter Name"<<endl; 
gets(st.name); 
cout<<"Enter Roll No"<<endl; 
cin>>st.rno; 
cout<<"Enter Class"<<endl; 
cin>>st.cls; 
for(ma=0;ma<5;ma++) 
{ 
cout<<"Enter Marks in subj"<<ma+1<<endl; 
cin>>st.marks[ma]; 
} 
gpj.write((char*)&st,sizeof(st)); 
tm=st.marks[0]+st.marks[2]+st.marks[1]+st.marks[3]+st.marks[4]; 
rt.perc=tm/5; 
if(rt.perc>=75) 
rt.grade='A'; 
if((rt.perc>=60)&&(rt.perc<75)) 
rt.grade='B'; 
if((rt.perc>=50)&&(rt.perc<60)) 
rt.grade='C'; 
if((rt.perc>=40)&&(rt.perc<50)) 
rt.grade='D'; 
if(rt.perc<40) 
rt.grade='F'; 
rt.rnos=st.rno; 
jpg.write((char*)&rt,sizeof(rt)); 
}} 
gpj.close(); 
jpg.close(); 
int r,k=0; 
ifstream god("result.dat",ios::binary); 
if(!god) 
{ 
cout<<"File Erroe"<<endl; 
} 
else 
{ 
god.seekg(0); 
cout<<endl<<"ENTER ROLL NO"<<endl; 
cin>>r; 
while(god.read((char*)&rt,sizeof(rt))) 
{ 
if(r==rt.rnos) 
{ 
k++; 
cout<<" Roll no :"<<rt.rnos<<endl<<" Percentage :"<<rt.perc<<endl<<" Grade :"<<rt.grade; 
} 
} 
if(k==0) 
cout<<"Roll no not present"<<endl; 
god.close(); 
} 
getch(); 
}