Question

c++

The program will be recieved from the user as input name of an input file and and output.file.

then read in a list of name, id# and score from input file (inputFile.txt)

and initilized the array of struct.

find the student with the higher score and output the students info in the output file

obtain the sum of all score and output the resurl in output file.

prompt the user for a name to search for, when it find the, will output to a file(output)

prompt for another name until the word done is typed.

calclate and output the sum of all scores for the found name

header file.   

*dont make array size a global concstan. it must pass it as a parameter as necessary

function for

input function ( propagate the array of structs to real in all the data) “one array of a struct “, must declare a struct with three members(names, ids, scores). read all the data frim infile.txt

search function score

sum function

search fuction name (search for a name and return the proper index

console input / output

type input file name : inputFile.txt

type output file name : outputFile.txt

type student’s name you are searching for (type done to exit) : Emma

type student’s name you are searching for (type done to exit): Jason

type student’s name you are searching for (type done to exit): done

Thank you!

outputFile.txt

high score

ID # NAME SCORE

—— —————- ————

9987 Emma. 82.96

total score for all students:

280.78

Search Names:

ID # NAME SCORE

—— —————- ————

9987 EMMA 82.96

1923 JEFF 80.93

9486 JAMES 39.92

TOTAL SCORE: 203.81

inputFile.txt

EMMA KIM

9987 82.96

JEFF PETTERSON

1923 80.93

JAMES MORGAN

9486 39.92

CLARK HOFFMAN

3745 76.97

Answer 1

I am considering each student data in 2 lines. 1->name, 2->id, score

Code:

#include<bits/stdc++.h>
using namespace std;

//structure of a student data
typedef struct student {
   string name;
   int id;
   double score;
}student;

//function used to modify the size of the array
student* get_exact(student array[],int current){
   student *new_array;
   new_array=new student[current];
   for(int i=0;i<current;++i)
       new_array[i]=array[i];
   return new_array;
}

//function to print the student data..
//It is just to check the data.
void print(student student_array[],int size){
   for(int i=0;i<size;++i){
       cout<<(student_array[i].id)<<" "<<(student_array[i].name)<<" "<<(student_array[i].score)<<endl;
   }
}

//Finding student with maximum score
void find_max(ofstream& outFile, student student_array[],int size){
   int max=0;
   for(int i=1;i<size;++i){
       if(student_array[max].score<student_array[i].score)
           max=i;
   }
   //Write the student details in output file.
   outFile<<"high score"<<endl;
   outFile<<"ID # NAME SCORE"<<endl;
   outFile<<"---------------------------"<<endl;
   outFile<<(student_array[max].id)<<" "<<(student_array[max].name)<<" "<<(student_array[max].score)<<endl;
}

//finding total sum of scores
void find_sum(ofstream& outFile, student student_array[],int size){
   double total_score=student_array[0].score;
   for(int i=1;i<size;++i)
       total_score+=student_array[i].score;
   //Writing total score to file
   outFile<<"total score for all students: "<<endl;
   outFile<<total_score<<endl;
}

//comparing 2 strings case insensitive
bool compare(string a,string b){
   int l1=a.length(),l2=b.length();
   if(l1!=l2) return false;
   for(int i=0;i<l1;++i){
       if(tolower(a[i])!=tolower(b[i])) return false;
   }
   return true;
}

//Search a name and finding sum of scores of all searches
void search(ofstream& outFile, student student_array[],int size){
   double total_score=0;
   outFile<<"Search Names:"<<endl;
   outFile<<"ID # NAME\t\tSCORE"<<endl;
   outFile<<"---------------------------"<<endl;
   while(true){
       cout<<"type student\'s name you are searching for (type done to exit) : ";
       string s;
       cin>>s;
       if(s=="done") break;
       for(int i=0;i<size;++i){
           if(compare(s,student_array[i].name)){
               outFile<<(student_array[i].id)<<" "<<(student_array[i].name)<<" "<<(student_array[i].score)<<endl;
               total_score+=student_array[i].score;
           }
       }
   }
   outFile<<"TOTAL SCORE: "<<total_score<<endl;
}

int main() {
   //Take input in string format
   //Convert it into char[] as ifstream,ofstream only accepts char* type not string type
   string input,output;
   cout<<"type input file name : ";
   cin>>input;
   cout<<"type output file name : ";
   cin>>output;
   char input_file[input.length()+1],output_file[output.length()+1];
   strcpy(input_file, input.c_str());
   strcpy(output_file, output.c_str());
  
   //read file
   ifstream inFile(input_file);
   //Exit if reading fails
   if(inFile.fail()) {
       cerr << "File open fails." << endl;
       exit (1);
   }
   //Initialize the array of students with size 4
   int size=4;
   student *student_array;
   student_array=new student[size];
   int current=0;
  
   while(!(inFile.eof()) ) {
       //Get data
       string nam,dat;
       getline(inFile, nam);
       getline(inFile,dat);
      
       //convert dat to char[] as it contains both id and score(double)
       char data[dat.length()+1];
       //convert nam to char[] as nam contains firstname and lastname
       //and we are using only firstname
       char name1[nam.length()+1];
       strcpy(name1,nam.c_str());
       //get firstname using strtok
       char *token1=strtok(name1," ");
       string name(token1);//convert char[] to string
      
       strcpy(data,dat.c_str());
       char *token = strtok(data, " ");
       int id=atoi(token);//get id
       token = strtok(NULL, " ");
       double score=atof(token); //get score
       //if array is full then take another array and update current array with double size
       if(current==size){
           student* new_array;
           new_array=new student[2*size];
           for(int i=0;i<size;++i){
               new_array[i]=student_array[i];
           }
           size*=2;
           student_array=new_array;
       }
       //Store data in next empty index in array
       student_array[current].name=name;
       student_array[current].id=id;
       student_array[current].score=score;
       ++current;
       //cout<<name<<" "<<id<<" "<<score<<endl;
   }
   //current<=size so empty space is there so get array of exact size
   student_array=get_exact(student_array,current);
   size=current;
   //print(student_array,size);
   inFile.close();
   //open output file
   ofstream outFile (output_file, std::ofstream::out);
   //get student details of maximum score
   find_max(outFile,student_array,size);
   //get sum of scores of all students
   find_sum(outFile,student_array,size);
   //search names of students and get details if found
   search(outFile,student_array,size);
   return 0;

}

Output:

type input file name : ..\\input.txt
type output file name : ..\\output.txt
type student's name you are searching for (type done to exit) : Emma
type student's name you are searching for (type done to exit) : James
type student's name you are searching for (type done to exit) : Jeff
type student's name you are searching for (type done to exit) : done

If you have any doubts or finds any error kindly ask me. Thank you

- D X - 0% output.txt - Notepad File Edit Format View Help high score ID # NAME SCORE Help ----------- 1 input.txt - Notepad File Edit Format View EMMA KIM 9987 82.96 JEFF PETTERSON 1923 80.93 JAMES MORGAN 9486 39.92 CLARK HOFFMAN 3745 76.97 9987 EMMA 82.96 total score for all students: 280.78 Search Names: ID # NAME SCORE 9987 EMMA 82.96 9486 JAMES 39.92 1923 JEFF 80.93 TOTAL SCORE: 203.81