Hello World! (ha) This is my first post to this site. I am desperate because my code is due at midnight, and I can't seem to find a helpful example of the assignment I'm working on. My teacher is foreign and sucks at teaching, so bear with me.
I have to write a program to grade a multiple choice exam. This is the input file with the key at the top, student ids and their answers:(data5.1)
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abcdefabcdefabcdefab
c1234567 abcdefabcdefabcdefab
c1234566 aaaaaaaaaaaaaaaaaaaa
c1234565 abcdefabcdefabcdefaa
c1234564 abcdefabcdefabcdef
c1234563 abcdefabcdefabcdefabbb
c1234562 abcdefabcdefabcdxxab
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So I'm trying to figure out how to output this:
Enter the input file name: data5.1
Key:abcdefabcdefabcdefab
c1234567 abcdefabcdefabcdefab 20
c1234566 aaaaaaaaaaaaaaaaaaaa 4
c1234565 abcdefabcdefabcdefaa 19
c1234564 abcdefabcdefabcdef Too few answers
c1234563 abcdefabcdefabcdefabbb Too many answers
c1234562 abcdefabcdefabcdxxab Invalid answers
There are 6 student records.
.....This is my code so far. Any help is appreciated. I need an eof controlled loop, 3 functions (void, int, and bool)&of course int main...Thanks!!!!!!
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#include <iostream>
#include <fstream>
#include <string>
using namespace std;
int main()
{
ifstream myIn; //declare variables
string answers;
int count=0;
string fileName;
string key;
string SID;
/*******************************************************************
Function Purpose: Print the purpose of the program
Parameters: None
Pre-condition: None
Post-condition: The purpose of the program is printed
********************************************************************/
void PrintPurpose();
{
cout<<"***************************************************************"<<endl;
cout<<"The purpose of the program is to grade a multiple choice exam"<<endl;
cout<<"based on a user input file."<<endl;
cout<<"***************************************************************"<<endl;
cout<<endl;
}
/**********************************************************************
This section will receive user input and print an error message if the
data file DNE. It also counts the number of student records.
************************************************************************/
cout<< "Enter the input file name: "<<endl;
cin>>fileName;
myIn.open(fileName.c_str());
while(! myIn)
{
cout<< fileName << " does not exist. Enter the input file name: "<<endl;
cin>>fileName;
myIn.open(fileName.c_str());
}
myIn>>key;
cout<<"Key: "<<key<<endl;
cout<<endl;
myIn>>SID;
myIn>>answers;
while(myIn)
{
count++;
cout<<SID<<"\t"<<answers<<endl;
myIn>>SID;
myIn>>answers;
}
/*******************************************************************
Function Purpose: Grades the student answers using the keys and returns
how many are correct.
Parameters: ?
Pre-condition: ?
Post-condition: ?
********************************************************************/
int GradeMCExam(string keys, string answers);
{
}
/*********************************************************************
Function Purpose: Check to see if any of the student answers are invalid
Parameters: string answers: string contains student's answer
Pre-condition: each character in the answers string contains and answer
to the corresponding exam question
Post-condition: the validity of the answers is determined and returned
**********************************************************************/
bool InvalidAnswers(string key, string answers);
{
//length(), getline(), substr(), find()?????? STD LIBRARY FUNCTIONS
}
if (answers.length()>20)
{
cout<<"Too many answers"<<endl;
}
else if (answers.length()<20)
{
cout<<"Too few answers"<<endl;
}
cout<<endl;
cout<<"There are "<<count<< " student records."<<endl;
return 0;
}
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Any help is appreciated!
