how can i use file IO to read the runner.dat file that was made from this file a

Question

how can i use file IO to read the runner.dat file that was made from this file and then rank the runners by first, second, and third place?

#include <fstream>
#include <iostream>
#include <iomanip>

using namespace std;

main()
{
    char name[3][10];
    int time[3];
   
    for(int i = 0; i < 3; i++)
    {
    cout << "What is runner number" << " " << i+1 << "'s name?"<< endl;
    cin >> name[i+1];
}

for(int i = 0; i < 3; i++)
{
  cout << "What was" << " " << name[i+1] << "time?(in seconds)" << endl;
  cin >> time[i];
  while(time[i+2] == time[i] || time[i+1] == time[i] || time[i+1] == time[i+2]) // this validation is not working.
  {
   cout << "Sorry you cant enter a duplicate time" << endl;
   cin >> time[i];
  }
}

ofstream writer("runner.dat");

cout << "Name" << setw(7) << "Time" << endl;


  
         for(int w = 0; w < 3; w++)
     {
     cout << name[w+1] << setw(7) << " " << time[w] << endl;
  }
  

for(int l = 0; l < 3; l++)
{
  writer << name[l+1] << setw(7) << " " << time[l] << endl;
    }
   
    writer.close();

}

Explanation / Answer

#include <fstream>
#include <iostream>
#include <iomanip>

using namespace std;
int main()
{
   char name[3][10],namestr[10];
   int i,w,l, time[3],a;

   for(i = 0; i < 3; i++)
   {
       cout << "What is runner number" << " " << i+1 << "'s name?"<< endl;
       cin >> name[i+1];
   }

   for(i = 0; i < 3; i++)
   {
       cout << "What was" << " " << name[i+1] << " time?(in seconds)" << endl;
       cin >> time[i];

       //in this code you have check with next element you cant read data from user then it returns null so it no working properly.
       //For example i = 0 you have read the value from user and store in time[0] but you cant read remining data, but you check with those also. so the condition not working properly
       //while(time[i+2] == time[i] || time[i+1] == time[i] || time[i+1] == time[i+2]) // this validation is not working.
       //{
       //   cout << "Sorry you cant enter a duplicate time" << endl;
       //   cin >> time[i];
       //}

       if(i==1)
       {
           while(time[i-1] == time[i]){
               cout << "Sorry you cant enter a duplicate time" << endl;
               cin >> time[i];
           }

       }
       else if(i == 2){
           while(time[i-1] == time[i] || time[i-2] == time[i]){
               cout << "Sorry you cant enter a duplicate time" << endl;
               cin >> time[i];
           }
       }
   }

   ofstream writer("D: unner.dat");

   cout << "Name" << setw(7) << "Time" << endl;

   for(w = 0; w < 3; w++)
   {
       cout << name[w+1] << setw(7) << " " << time[w] << endl;
   }

   for(l = 0; l < 3; l++)
   {
       for(int k = l+1; k < 3; k++){
           if(time[l] > time[k])
           {
               a = time[l];
               time[l] = time[k];
               time[k] = a;
               namestr[10] = name[l][10];
               name[l][10] = name[k][10];
               name[k][10] = namestr[10];
           }
           //writer <<"First " << name[l+1] << setw(7) << " " << time[l] << endl;
       }

  
       //else if(time[l+1] >time[l+2])
       //writer <<"Second " << name[l+1] << setw(7) << " " << time[l] << endl;
       //else
       //writer <<"Third " << name[l+1] << setw(7) << " " << time[l] << endl;

   }
       for(int l = 2; l >= 0; l--)
       {
           writer <<name[l+1] << setw(7) << " " << time[l] << endl;
       }

   return 0;
}

Related Questions

Navigate

• Browse (All)
• Browse H
• Subjects

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