Write a program to read a set of floating point numbers from user and save the n

Question

Write a program to read a set of floating point numbers from user and save the numbers in a file (output.txt) formatted as shown below. After the file is saved, notify the user and ask if next set of numbers are to be entered. Repeat until user enters -1 for number count.

How many numbers to enter (Enter -1 to quit)? 5

Enter numbers: 1.5 0.23 5.55 2.56 3.7 Numbers saved to disk.

How many numbers to enter (Enter -1 to quit)? 2

Enter numbers: 10.2 33.6 Numbers saved to disk.

How many numbers to enter (Enter -1 to quit)? -1

output.txt 1.5,0.23,5.55,2.56,3.7 10.2,33.6

Note: Each number in output.txt should be separated by a comma symbol.

Explanation / Answer

#include<iostream>
#include<fstream>
using namespace std;
int main()
{
  
   ofstream file;//creating variable to write to a file
   file.open("output.txt",fstream::app);//opening file in apped mode
  
   int c;
   int l=0;
   while(1)
   {
       int n;
       //prompting input
       cout<<"How many numbers to enter (Enter -1 to quit)?";
       cin>>n;
       if(n==-1)break;//breaking loop
       float a[n];//creating array..of floating point numbers
       //reading numbers
       int i=0;
       cout<<"Enter numbers: ";
       while(i<n)
       {
           cin>>a[i];
           if(l!=0){
           file<<",";
           }
           file<<a[i];//writing to file..
          
           i++;
           l++;  
       }
       cout<<"Numbers saved to disk. ";
      
      
       l++;
   }
   file<<" ";
   file.close();
  
   return 0;
}

/*
input
How many numbers to enter (Enter -1 to quit)?5
Enter numbers: 1.5 0.23 5.55 2.56 3.7
Numbers saved to disk.
How many numbers to enter (Enter -1 to quit)?2
Enter numbers: 10.2 33.6
Numbers saved to disk.
How many numbers to enter (Enter -1 to quit)?-1

Process exited normally.
Press any key to continue . . .

output.txt
1.5,0.23,5.55,2.56,3.7,10.2,33.6

*/

Related Questions

Navigate

• Browse (All)
• Browse W
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.