hw7 code #include<iostream> #include<fstream> #include<climits> #include <string

Question

hw7 code

#include<iostream>
#include<fstream>
#include<climits>
#include <string>

using namespace std;

int processFile(ifstream& ifile, long ithVal, long& retIthVal, long& minimum, long& maximum)
{
   long num;
   maximum = LONG_MIN;
   minimum = LONG_MAX;
   int i = 0;
  
   while(ifile>>num)
   {   
       if(num>maximum)
           maximum = num;
       if(num<minimum)
           minimum = num;
       i++;
       if(i==ithVal)
           retIthVal = num;
   }
   if(ithVal < i)
       return 0;
   else   
       return 1;
}
int main()
{
   string fname,line;
   long i, ithVal, min, max;
   cout<<"Input File Name: ";   
   cin >> fname;
   ifstream myfile;
   myfile.open(fname.c_str());   
   if (myfile)   
   {
       cout<<"Unable to open "<<fname<<endl;   
   }

   cout<<"Which number do you want to return? ";
   cin>>i;

   int ret = processFile(myfile, i, ithVal, min, max);

   cout<<"Min is {"<<min<<"}. ";
   cout<<"Max is {"<<max<<"}. ";

   if(ret==0)
       cout<<" Value{"<<i<<"} is "<<ithVal<<". ";
   else   
       cout<<" There aren't that many numbers in the file! ";
   myfile.close();   
   return 0;
}

To get started, copy the whole project for Homework 7! If you don't know how to do this, then create a new project and just copy and paste the code in the *.cpp file. As for the previous assignment, the code must prompt the user for an input filename and a value that is used as the position of the number in the array to display (It is the position in the array this time instead of "in the file."). For example, if the user enters 100, then you will print the 100^ number in the array as part of the output. If the user enters a number greater that the number of values in the array, then you print an error message (see below).

Explanation / Answer

#include<iostream>
#include<fstream>
#include<algorithm>
#include<climits>
#include <string>
using namespace std;
int readArray(ifstream& ifile,long arr[])
{
long num;
int i = 0;

while(ifile>>num)
{   
arr[i]=num;
   i++;

if(i==1000)
break;
}
return i;
}
void sortArray(long arr[],int numberInTheArray)
{
sort(arr,arr+numberInTheArray);

}
int main()
{
string fname,line;
long i, ithVal, min, max;
long arr[5000];
cout<<"Input File Name: ";   
cin >> fname;
ifstream myfile;
myfile.open(fname.c_str());   
if (!myfile)   
{
cout<<"Unable to open "<<fname<<endl;   
return 0;
}
cout<<"Which number do you want to return? ";
cin>>i;
int ret = readArray(myfile,arr);
cout<<ret<<endl;
max = LONG_MIN;
min = LONG_MAX;
for(int j=0;j<ret;j++)
{
    if(max<arr[j])
    {
    max=arr[j];
   
    }
    if(min>arr[j])
    {
    min=arr[j];
    }
   
}
ithVal=arr[i-1];
cout<<"Before sort: "<<endl ;
cout<<"Min is {"<<min<<"}. ";
cout<<"Max is {"<<max<<"}. ";
if(ret!=1000)
cout<<"Warning: Only "<<ret<<" numbers were read into the array"<<endl;
if(i>1000)
{
    cout<<i<<" is bigger than 1000!"<<endl;
}
else if(i<=ret)
cout<<"Value{"<<i<<"} is "<<ithVal<<". ";
else   
cout<<"There aren't that many numbers in the file! ";
sortArray(arr,ret);
cout<<" After Sort"<<endl;
cout<<"Min is {"<<min<<"}. ";
cout<<"Max is {"<<max<<"}. ";
if(ret!=1000)
cout<<"Warning: Only "<<ret<<" numbers were read into the array"<<endl;
if(i>1000)
{
    cout<<i<<" is bigger than 1000!"<<endl;
}
else if(i<=ret)
cout<<"Value{"<<i<<"} is "<<arr[i-1]<<". ";
else   
cout<<"There aren't that many numbers in the file! ";
myfile.close();   
return 0;
}

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