Write a program in C++ to create a RAMDRIVE and associate an acyclic directory structure to it. Use this RAMDRIVE to store input, out files to run a calculator program.

Problem Statement:

Write a program in C++ to create a RAMDRIVE and associate an acyclic directory structure to it. Use this RAMDRIVE to store input, out files to run a calculator program.

PROGRAM

ramdisk.cpp

#include<iostream>

#include <stdlib.h>

using namespace std;

int main(){

cout<<"Creating Ramdisk...\n\n";

system("mkdir /mnt/ramdisk");

system("mount -t tmpfs -o size=256M tmpfs /mnt/ramdisk");

cout<<"Ramdisk created at /tmp/ramdisk/ "<<endl<<endl;

cout<<"Total size available on ramdrive:\n";

system("df -h /mnt/ramdisk");

cout<<"\n\n";

cout<<"Amount of Ramdrive used:\n";

system("du -h /mnt/ramdisk/");

system("cp input.txt /mnt/ramdisk");

system("cp calc.cpp /mnt/ramdisk");

return 0;

}

calc.cpp

#include<iostream>

#include<fstream>

using namespace std;

int main()

{

ofstream fout;

fout.open("/mnt/ramdisk/input.txt");

int a,b,c,d,y=1;

while(y)

{

fout<<endl<<"First number : ";

cout<<"\n\nEnter Number ";

cin>>a;

fout<<a<<endl<<"Second number : ";

cout<<"\nEnter Another Number ";

cin>>b;

fout<<b<<endl;

cout<<"\nSelect your option\n\n1.Addition\n\n2.Subtraction\n\n3.Multiplication\n\n4.Division\n\nPress any key to exit ";

cin>>c;

switch(c)

{

case 1:

{

d=a+b;

cout<<"\n\nAnswer: "<<d;

fout<<"Addition is : "<<d;

break;

}

case 2:

{

d=a-b;

cout<<"\n\nAnswer: "<<d;

fout<<"Subtraction is : "<<d;

break;

}

case 3:

{

d=a*b;

cout<<"\n\nAnswer: "<<d;

fout<<"Multiplication is : "<<d;

break;

}

case 4:

{

d=a/b;

cout<<"\n\nAnswer: "<<d;

fout<<"Division is : "<<d;

break;

}

default:

{

y=0;

break;

}

}

}

fout.close();

return 0;

}