Reading Data from a File into an Array Reading the contents of file into an arra

Question

Reading Data from a File into an Array Reading the contents of file into an array is straightforward: the file and us to read each item from the file, storing each item in an array element. The a loo ate until either the array is filled or the end of the file is reached. Program loop should by opening a file that has 10 numbers stored in it and then reading the file's demonstrates into an array. Program 7-3 1 This program reads data from a file into an array. 2 include Kiostream> 3 finclude 4 using namespace std 6 int main 8 const int ARRAY SIZE 10; Array size 9 int numbers (ARRAY SIZE]: Array with 10 elements 11 int count 0; ifstream inputFile; Loop counter variable Input file stream object 13 ll open the file. 14 input File open("Ten Numbers .txt")

Explanation / Answer

/*Assumptions: 1.Marks range for calculating grades is assumed.
                       2. filename 'example.txt' is to be replaced by your own filename*/  

#include<iostream>
#include<fstream>
#include<string>
using namespace std;

int main()
{  
   const int SIZE = 20;
   int count = 0; //to get the count of marks in the file
  
    int arr[SIZE];
   char grade[SIZE];

    ifstream File;
    File.open("example.txt");
    while(!File.eof())
    {
        File >> arr[count];
        count++;
    }

    File.close();

    for(int i=0;i<count;i++) //assigning grades to the students
    {
        if(arr[i]>=90)
           grade[i]='A';
       else if(arr[i]>=80 && arr[i]<90)
           grade[i]='B';
       else if(arr[i]>=70 && arr[i]<80)
           grade[i]='C';
       else
           grade[i]='D';
    }

    cout<<"grades of students are: ";
   for(i=0;i<count;i++)
   {
   cout<<"student "<<i+1<<" "<<grade[i]<<endl;
   }

    return 0;
}

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