c issue with variables not being declared in scope error and mismatched types warning [closed]-CodePudding

I have run into an issue with my program. The basis of the program, in the grand scheme of things, is to read input about a student from files. This includes their name, ID, homework scores and test scores. It is then supposed to calculate all the scores and produce a letter grade. I'm currently only working on printing out the name and ID. My issue is i get errors for all my variables saying they are not declared in this scope. I also get a warning about mismatched types for my string (no idea what that means). Example of not declared in scope error:

part1.cpp:38:2: error: ‘infile’ was not declared in this scope
  infile.open (out);
  ^
part1.cpp:38:15: error: ‘out’ was not declared in this scope
  infile.open (out);

mismatched types warning:


part1.cpp:11:15: note:   mismatched types ‘std::basic_ostream<_CharT, _Traits>’ and ‘int’
   outfile <<  name << "  "
               ^
In file included from /usr/include/c  /4.8.2/string:52:0,
                 from /usr/include/c  /4.8.2/bits/locale_classes.h:40,
                 from /usr/include/c  /4.8.2/bits/ios_base.h:41,
                 from /usr/include/c  /4.8.2/ios:42,
                 from /usr/include/c  /4.8.2/ostream:38,
                 from /usr/include/c  /4.8.2/iostream:39,
                 from part1.cpp:1:

here is the overall code:

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




void printOutput (std::string name,  std::string Id, float HPfinalscore, float testFinalscore, 
          float overallScore, string LetterGrade, ostream& outfile)
{
  outfile <<  name << "  "
      <<   Id << "  ";
      /*
      << HPfinalscore << "  "
      << testFinalscore << "  "
      << overallScore << "  "
      << LetterGrade;
      */
}



int main()
{
  ofstream outfile;
  ifstream infile; 
  
  int num;
  std::string file_name;
  std::string name; 
  std::string Id;
  std::string LetterGrade;

  float  HPfinalscore = 0, testFinalscore=0, overallScore=0;

    std::cout<<"How many files are you processing: ";
    cin>>num;
    infile.open (out);
    for(int i=0;i<num;i  )
    {
        int count[10];
        for(int i=0;i<10;i  )
            count[i]=0;
          char c,s[1000];
          std::cout<<"Please input the name of the file: ";
          cin>>file_name;
          infile.open(file_name.c_str());
        if ( !infile)
            {
                continue;
                return 0;
            }


            outfile.open("Result");
                if ( !outfile)
                    {
                        std::cout << "Could not open output file \n";
                        return 0;
                    }
    
  

  infile >> name; 
  while(!infile.eof())
    {
      infile >> Id;
      /*
      HPfinalscore = getHPScores(infile); 
      testFinalscore = getTestscores(infile); 
      overallScore = EndingScore(HPfinalscore, testFinalscore); 
      LetterGrade= Grade(overallScore);
    */
    

      printOutput (name, Id, HPfinalscore, testFinalscore, overallScore, 
           LetterGrade, outfile);
      infile >> name; //try to read another name
     
     
    }
  infile.close();
  outfile.close();
  return 0;
}
}

So my question is how do I get my variables to be declared correctly? Also any info on the warning and how to handle it would be greatly appreciated.

CodePudding user response：

Change ifstream, ostream, and ofstream to std::ifstream, std::ostream, and std::ofstream. Also, get rid of this line:

infile.open(out);