Question

The program will need to accept two input arguments: the path of the input file and the path of the output file. See etc/cpp/example.ifstream.cpp for the basis of how to do this. Once the input and output file paths have been received, the program will need to open the input and output files, read and process each input file line and create a corresponding output file line, close the input and output files, and then create and output some summary lines to the console. Note that the summary lines can be output to the console before or after the input and output files are closed, but it would be best to output them to the console after the files have been closed. Each input line will either be a comment line or shape specification line. Your program will need to ignore the comments lines and process the shape specification lines. There will be three types of shapes: a circle, a triangle, and a square. Each shape specification lines will be in this form, with the different values separated by spaces: The shape identifier will be an integer, the shape type will be a string, and the shape measure will be a double. So, for example, you might encounter lines like this: # this line is a comment and can be ignored…it starts with the pound/hash character 1 circle 3.51 2 triangle 4.62 3 square 5.73 For comments lines, lines that start with the pound/hash character, you can ignore them. For the other lines, you should calculate the shape’s area and create an output line in this form:

<shape identifier> <shape type> < shape area> For circle shape lines, the shape measure represents the radius of a circle (r) and thus the area of the circle is A = PI * r * r (where PI can be a defined constant double of 3.14). For triangle shape lines, the shape measure represents the length of the side of an equilateral triangle (a) and thus the area is A = sqrt(3) / 4 * a * a. For square shape lines, the shape measure represents the length of one side of the square (a) and thus the area is A = a * a. So, for the input file lines above, the output file lines would look like this (with the area values formatted with a precision of three decimal places): 1 circle 38.685 2 triangle 9.242 3 square 32.833

And, the summary lines that should be sent to the console, if the example above represents all of the shape specifications, would look like this:<your name> - CS 1336 – Assignment 25 Number of circles: 1 Number of triangles: 1 Number of squares: 1 Average circle area: 38.685 Average triangle area: 9.242 Average square area: 32.833 Average shape area: 26.920 In case it is not obvious, the average circle area should be calculated by summing all of the individual circle areas and then dividing by the number of circles. And, the same pattern should be used for the average triangle area and the average square area. Finally, the average shape area should be calculated by adding all of the areas together and dividing by the total number of shapes.

Answer 1

Here is the completed code for this problem. Comments are included, go through it, learn how things work and let me know if you have any doubts or if you need anything to change. If you are satisfied with the solution, please rate the answer. Thanks

#include<iostream>

#include<fstream>

#include<math.h>

#include<iomanip>

#define PI 3.14

using namespace std;

int main(){

              //getting and storing input / output file names

              string input,output;

              cout<<"Enter input file name: ";

              cin>>input;

              cout<<"Enter output file name: ";

              cin>>output;

              //opening input file

              ifstream inFile(input.c_str());

              //exiting if file not found

              if(!inFile){

                           cout<<input<<" not found"<<endl;

                           return 0;

              }

              //opening output file, exiting if can't open

              ofstream outFile(output.c_str());

              if(!outFile){

                           cout<<output<<" cant be opened to write"<<endl;

                           return 0;

              }

             

              //initializing required variables

              double circleArea=0,triangleArea=0,sqArea=0,measure;

              int numCircles=0,numTriangles=0,numSq=0, identifier;

              string line,type;

             

              //setting a fixed precision of 3 digits after decimal point

              outFile<<setprecision(3)<<fixed;

              cout<<setprecision(3)<<fixed;

             

              //looping until end of file

             

              while(true){

                           //discarding the line if it starts with #

                           if(inFile.peek()=='#'){

                                         getline(inFile,line);

                           }else if(!inFile.good()){

                                         //end of file, breaking loop

                                         break;

                           }

                           else if(inFile>>identifier){

                                         //read the identifier, reading type and measure

                                         inFile>>type;

                                         inFile>>measure;

                                         double area=0;

                                         //finding type, calculating its area, appending to total area

                                         if(type=="circle"){

                                                       area=PI*measure*measure;

                                                       circleArea+=area;

                                                       numCircles++;

                                         }else if(type=="triangle"){

                                                       area=(sqrt(3.0)/4.0)*(measure*measure);

                                                       triangleArea+=area;

                                                       numTriangles++;

                                         }else if(type=="square"){

                                                       area=measure*measure;

                                                       sqArea+=area;

                                                       numSq++;

                                         }

                                         //writing to output file

                                         outFile<<identifier<<" "<<type<<" "<<area<<endl;

                                         inFile.ignore(); //ignoring newline character

                           }

              }

              //closing files

              inFile.close();

              outFile.close();

             

              //finding averages

              double avgCircleArea=(double)circleArea/numCircles;

              double avgTriangleArea=(double)triangleArea/numTriangles;

              double avgSqArea=(double)sqArea/numSq;

              double avgShapeArea=(double) (circleArea+triangleArea+sqArea)/(numCircles+numTriangles+numSq);

             

              //displaying stats

              cout<<"<your name> - CS 1336 - Assignment 25"<<endl;

              cout<<"Number of circles: "<<numCircles<<endl;

              cout<<"Number of triangles: "<<numTriangles<<endl;

              cout<<"Number of squares: "<<numSq<<endl;

             

              cout<<"Average circle area: "<<avgCircleArea<<endl;

              cout<<"Average triangle area: "<<avgTriangleArea<<endl;

              cout<<"Average square area: "<<avgSqArea<<endl;

              cout<<"Average shape area: "<<avgShapeArea<<endl;

              return 0;

}

/*OUTPUT*/

Enter input file name: shapes.txt

Enter output file name: output.txt

<your name> - CS 1336 - Assignment 25

Number of circles: 1

Number of triangles: 1

Number of squares: 1

Average circle area: 38.685

Average triangle area: 9.242

Average square area: 32.833

Average shape area: 26.920

/*output.txt*/

1 circle 38.685

2 triangle 9.242

3 square 32.833