oops week15

Week 15 solutions

15a) Write a C++ program that removes all vowels 
from a file.For example, once upon a time!
Becomes nc pn tm!.


File: vowel.txt
  
 once upon a time!

Program:

#include<iostream>
#include<fstream>
using namespace std;
int main()
{ 
 ifstream in("vowel.txt");
 ofstream file("15a_op.txt");
 char c;
 cout<<"\nFile before removing vowels is :\n";
 c=in.get();
 while(in.good())
  {
         cout<<c;
  if(c!='a'&&c!='e'&&c!='i'&&c!='o'&&c!='u')
   file<<c;
  c=in.get();
 }
 in.close();
 file.close();
 cout<<"\nFile after removing vowels is :\n";
 ifstream nh("15a_op.txt");
 cout<<nh.rdbuf();
 nh.close();
 return 0;
 
}
output:

nc pn tm!.
  

15 b)Write a C++ program that replaces punctuation with 
whitespace.For example,“don?t usethe as-if rule”
becomes dont use the asif rule”.
file:punct.txt

“don't usethe as-if rule”
program:

#include<iostream>
#include<fstream>
#include<cctype> or &#include<ctype.h>
using namespace std;
int main()
{
 ifstream in("punct.txt");
 ofstream file("15b_op.txt");
 char c;
 cout<<"\nFile before removing punctuations is :\n";
 c=in.get();
 while(in.good())
  {
         cout<<c;
  if(!ispunct(c))
   file<<c;
  c=in.get();
 }
 in.close();
 file.close();
 cout<<"\nFile after removing vowels is :\n";
 ifstream nh("15b_op.txt");
 cout<<nh.rdbuf();
 nh.close();
 return 0;
  
}

output:  (15b_op.txt)

dont use the asif rule

15 c) Write a C++ program to reverse the order of characters
in a text file.For example,asdfghjkl becomes lkjhgfdsa.


File:.txt

asdfghjkl

program:

#include<iostream>
#include<fstream>
#include<vector>
using namespace std;
int main()
{
 vector<char>v;
 ifstream in("15c.txt");
 cout<<"\nInput File :\n";
 char c=in.get();
 while(!in.eof())
  {
  cout<<c;
  v.push_back(c);
  c=in.get();
 }
 in.close();
 ofstream file("15c_op.txt");
 for(int i=v.size()-1;i>=0;i--)
 {
  file<<v[i];
 }
 file.close();
 cout<<"\nFile after reversing the contents :\n";
 ifstream nh("15c_op.txt");
 cout<<nh.rdbuf();
 nh.close();
 return 0;;
}

output:  (15c_op.txt)

lkjhgfdsa.