Question

Let's consider a file with the following student information: John Smith 99.0 Sarah Johnson 85.0 Jim Robinson 70.0 Mary Anderson 100.0 Michael Jackson 92.0 Each line in the file contains the first name, last name, and test score of a student. Write a program that prompts the user for the file name (read), then calculates and displays the average score by reading the data from the file. Your program should also present on screen the highest and lowest score in class. For the lowest and highest score, the last name should be included as well. The average, highest and lowest score must be saved into a file (output.txt). You should use at least two functions in your program. 1) Copy and paste the source code. (No test cases) 2) Provide one screenshot-output (screen), input file and output file.

programming language is C++. Please also provide an explanation of how to create a file with the given information and how to use that file in the program

Answer 1

output(console)

Activities y Visual Studio Code Tue Mar 24, 01:21 test_scores.cpp - HomeworkLib - Visual Studio Code 99% - ox File Edit Selection View Go Run Terminal Help PROBLEMS 1 OUTPUT DEBUG CONSOLE TERMINAL 1: bash + O X adithyacaspire-S:-/HomeworkLib/cps och test scores. cpp adithya@aspire-5:-/HomeworkLib/cpp$ g++ test_scores.cpp adithya@aspire-5:-/HomeworkLib/cpp$ ./a.out Enter the name of the file scores.txt Average score of all students: 89.6667 adithya@aspire-5:-/HomeworkLib/cpp$ A1 Ln 57, Col 4 Spaces: 4 UTF-8 LF C++ 3 Linux 0 5

output.txt

Activities Visual Studio Code Tue Mar 24, 01:22 i ( + 99% - ox output.txt - HomeworkLib - Visual Studio Code File Edit Selection View Go Run Terminal Help + test_scores.cpp scores.txt output.txt X cpp > output.txt i Highest Score: Mary Anderson 100.000000 2 Lowest Score: Jim Robinson 70.000000 3 A1 Ln 3, Col1 Spaces: 4 UTF-8 LF Plain Text g o

input file(scores.txt)

Activities y Visual Studio Code Tue Mar 24, 01:22 99% scores.txt - HomeworkLib - Visual Studio Code File Edit Selection View Go Run Terminal Help Ctest_scores.cpp scores.txt x output.txt cpp > 1 2 scores.txt John Smith 99.0 Sarah Johnson 85.0 Jim Robinson 70.0 Mary Anderson 100.0 Michael Jackson 92.0 3 4. 5 A1 A Ln 5, Col 21 Spaces: 4 UTF-8 LF Plain Text

CODE:

 #include<iostream> #include<fstream> #include<string> using namespace std; //calculates and displays average socre of students void avergae_score(string filename) { //sum initialized to 0 float score,sum=0.0; //n will be to track number of students int n=0; string firstname,lastname; //create an ifstream object ifstream f(filename); //until the end of the file while(f) { //read firstname,lastname and score //it is like cin>>firstname>>lastname>>score f>>firstname>>lastname>>score; //add score to sum sum+=score; //increment n n++; } //print the average cout<<"Average score of all students: "<<sum/n<<endl; } //puts the highest and lowest score students to output.txt void highest_lowest(string filename) { //intialize highest as least possible score and lowest as highest possible score float highest_score=-1,lowest_score=9999; //these variables will be helpful to write to output.txt string lowest_firstname,lowest_lastname,highest_firstname,highest_lastname; string firstname,lastname; float score; //open the file (to read) ifstream f(filename); //read until the end of the file while(f) { //read names and score f>>firstname>>lastname>>score; //if score is greater than higest score, highest score is score if(score>highest_score) { highest_score=score; highest_firstname=firstname; highest_lastname=lastname; } //if score is smaller than lowest score, lowest score is score if(score<lowest_score) { lowest_score=score; lowest_firstname=firstname; lowest_lastname=lastname; } } //open the file output.txt using ofstream ofstream out("output.txt"); //this is formatted text to be put in the file string s="Highest Score: "+highest_firstname+" "+highest_lastname+" "+to_string(highest_score)+"\n"; //similar to cout<<s out<<s; s="Lowest Score: "+lowest_firstname+" "+lowest_lastname+" "+to_string(lowest_score)+"\n"; out<<s; } int main() { string filename; cout<<"Enter the name of the file\n"; cin>>filename; avergae_score(filename); highest_lowest(filename); return 0; }