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# CS201 Assignment No 03 Fall 2019 Solution & Discussion

CS201 Assignment No 03 Fall 2019 Solution & Discussion

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AA.cpp

. there is mistake in code

this code add record but not show the record any one can help.

wesy yh cpp file correct hay complete hay ya incomplete

zahid bhai is assignment ki video ke alwa solution file men hy to plz send kar den

code link ni mila may be available in video.

AoA plz send me solution file.

CS201 Introduction to Programming Assignment 3 Solution & Discussion Fall 2019

Solution idea:

`#include<iostream>#include<fstream>#include<stdio.h>using namespace std;class Employee{    private:        int code;        char name[20];        float salary;    public:        void read();        void display();               int getEmpCode()            { return code;}               int getSalary()             { return salary;}               void updateSalary(float s)  { salary=s;}};void Employee::read(){    cout"Enter employee code: ";    cin>>code;    cout"Enter name: ";    cin.ignore(1);    cin.getline(name,20);    cout"Enter salary: ";    cin>>salary;}void Employee::display(){    coutcode" "name"\t"salaryendl;}fstream file;void deleteExistingFile(){    remove("EMPLOYEE.DAT");}void appendToFille(){    Employee    x;        x.read();        file.open("EMPLOYEE.DAT",ios::binary|ios::app);    if(!file){        cout"ERROR IN CREATING FILE\n";        return;    }    file.write((char*)&x,sizeof(x));    file.close();    cout"Record added sucessfully.\n";}void displayAll(){    Employee    x;        file.open("EMPLOYEE.DAT",ios::binary|ios::in);    if(!file){        cout"ERROR IN OPENING FILE \n";        return;    }    while(file){    if(file.read((char*)&x,sizeof(x)))        if(x.getSalary()>=10000 && x.getSalary()<=20000)            x.display();    }  file.close();}void searchForRecord(){    Employee    x;    int c;    int isFound=0;    cout"Enter employee code: ";    cin>>c;    file.open("EMPLOYEE.DAT",ios::binary|ios::in);    if(!file){        cout"ERROR IN OPENING FILE \n";        return;    }    while(file){        if(file.read((char*)&x,sizeof(x))){            if(x.getEmpCode()==c){                cout"RECORD FOUND\n";                x.display();                isFound=1;                break;            }        }    }    if(isFound==0){        cout"Record not found!!!\n";    }    file.close();}void increaseSalary(){    Employee    x;    int c;    int isFound=0;    float sal;    cout"enter employee code \n";    cin>>c;    file.open("EMPLOYEE.DAT",ios::binary|ios::in);    if(!file){        cout"ERROR IN OPENING FILE \n";        return;    }    while(file){        if(file.read((char*)&x,sizeof(x))){            if(x.getEmpCode()==c){                cout"Salary hike? ";                cin>>sal;                x.updateSalary(x.getSalary()+sal);                isFound=1;                break;            }        }    }    if(isFound==0){        cout"Record not found!!!\n";    }    file.close();    cout"Salary updated successfully."endl;}void insertRecord(){    Employee    x;    Employee newEmp;        newEmp.read();    fstream fin;    file.open("EMPLOYEE.DAT",ios::binary|ios::in);    fin.open("TEMP.DAT",ios::binary|ios::out);    if(!file){        cout"Error in opening EMPLOYEE.DAT file!!!\n";        return;    }    if(!fin){        cout"Error in opening TEMP.DAT file!!!\n";        return;    }    while(file){        if(file.read((char*)&x,sizeof(x))){            if(x.getEmpCode()>newEmp.getEmpCode()){                fin.write((char*)&newEmp, sizeof(newEmp));            }               fin.write((char*)&x, sizeof(x));        }    }    fin.close();    file.close();        rename("TEMP.DAT","EMPLOYEE.DAT");    remove("TEMP.DAT");    cout"Record inserted successfully."endl;}int main(){     char ch;     deleteExistingFile();     do{     int n;     cout"ENTER CHOICE\n""1.ADD AN EMPLOYEE\n""2.DISPLAY\n""3.SEARCH\n""4.INCREASE SALARY\n""5.INSERT RECORD\n";     cout"Make a choice: ";     cin>>n;     switch(n){          case 1:            appendToFille();            break;          case 2 :            displayAll();            break;          case 3:            searchForRecord();            break;        case 4:            increaseSalary();            break;        case 5:            insertRecord();            break;          default :                cout"Invalid Choice\n";     }     cout"Do you want to continue ? : ";     cin>>ch;     }while(ch=='Y'||ch=='y');        return 0;}`

CS201 Assignment No 3 Solution Fall 2019 – 2020
#include<iostream>
#include<fstream>
#include<string.h>

using namespace std;
voidshowemployee();

class employee {

intemployee_id;
stringemployee_name;
intemployee_salary;
public:
employee(){

}
voidsetid(int id){
employee_id=id;
}
voidsetname(string name){
employee_name=name;
}
voidsetsalary(int salary){
employee_salary=salary;
}
intgetid(){
return this->employee_id;
}
stringgetname(){
return this->employee_name;
}
intgetsalary(){
return this->employee_salary;
}
};
employeeanEmployee;
int id;
cout"enter employee ID: ";
cin>>id;
anEmployee.setid(id);
cout"enter employee Name: ";
string name;
cin>>name;
anEmployee.setname(name);
intsalry;
cout"enter employee Salary: ";
cin>>salry;
anEmployee.setsalary(salry);
ofstreamempfile("employee.txt",ios::binary|ios::app);

if(!empfile) {
cout "Cannot open file!" endl;
return ;
}
empfile.write((char*)&anEmployee, sizeof(employee));
//coutanEmployee.getid()" "anEmployee.getname()" """anEmployee.getsalary();
empfile.close();
if(!empfile.good()) {
cout "Error occurred at writing time!" endl;
return ;
}
cout "Employee Recored added Sucessfully!" endl;
}

voiddisplayRecord() {
// employee anEmployee;
ifstream file("employee.txt",ios::binary);
if(!file) {
cout"Error in opening file.\n";
return;
} else {
cout"ID"" ""Name""\t""Salary"endl;
cout"======================================================="endl;

coutanEmployee.getid()" "anEmployee.getname()"\t"anEmployee.getsalary();
coutendl;
}
file.close();
}
}

// function to show employee data
fstream file("employee.txt",ios::binary|ios::in|ios::out);
if(!file) {
cout"Error in opening file.\n";
return;
}
inteCode,sHike;
cout"Enter employee code\n";
cin>>eCode;
cout"Salary hike? ";
cin>>sHike;
file.seekg(sizeof(anEmployee)*(eCode-1),ios::beg);
anEmployee.setsalary(sHike+anEmployee.getsalary());
file.seekp(sizeof(anEmployee)*(eCode-1),ios::beg);
file.write((char*)&anEmployee,sizeof(employee));
cout"Salary updated successfully.\n";
}
main()
{
ifstream file("employee.txt");
if(file) {
file.close();
remove("employee.txt");
}
intprogramOption;
while(true){

cout"\n\n\n";
cout"Please enter 2 To DISPLAY FILE DATA..\n";
cout"Please enter 3 To INCREASE EMPLOYEE SALARY..\n";
cout"Please enter 4 To Exit Program..\n";

cout"==================================================================\n";
cin>>programOption;

switch(programOption){
case 1 :
break;
case 2 :
cout"Showing Employee Data.\n";
displayRecord();
break;
case 3 :
cout"Update salary .\n";
break;
case 4 :
cout"Shuting Down the Program..... .\n";
exit(1);
break;

}
}
}

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