Question

Program 5 Due 10/25 C-String and Two-dimensional Array Use An input data file starts with a student's name (on one line). Then, for each course the student took last semester, the file has 2 data lines. The course name is on the first line. The second line has the student's grade average (0 to 100) and the number of credits for the course Sample data: Jon P. Washington, Jr. Computer Science I 81 4 PreCalculus 75 3 Biology I 88 5 English II 100 3 Psychology 68 3 Write a complete C++ program to compute the GPA for the student. uirements: Use a two-dimensional char array for the course names, with one course a student may take at most 10 courses per semester. Use a parallel two- name per row; dimensional array with each row (which corresponds to a course) having three columns containing, respectively, the course grade average (input), the course credits (input) and the course GPA points (to be computed) The GPA points for a course is the product of grade value (A is 4, B is 3, C is 2, D is 1, F is 0) times course credits. (sum of GPA points) (sum of course credits) Semester GPA is Note: The grade average, number of course credits, and the GPA points can all be integers, but the GPA value must be decimal, and is to be output with 4 decimal places. Function and output requirements: One function does input. One function computes the course GPA points in the array. One function computes the GPA. One function outputs to a file the student's name, a table of the courses, grade rececived, course credits and GPA points earned. and finally, the student's semester GPA.

Answer 1

//below is code written in C++ to perform as per the requirement.

//NOTE:1 Please note that the below programs have been tested on ubuntu 14.04 system and compiled under g++ compiler. This code will also work on other IDE's.

// C++ code
#include <iostream>
#include <fstream>
#include <iomanip>
#include <string.h>
#include <algorithm>
#include <vector>
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
using namespace std;

int size = 0;

void input(char**, float**, char*);
void output(char**, float** , char* , float, char*);
int compute_gpa(float**, char*);

int main(){

char* studentName;
char* grades = new char[10];
char **nameCOurse = new char*[10];
float **metrics = new float*[10];
float GPA;

for(int i=0; i<10; i++){
metrics[i] = new float[3];
}

input(nameCOurse, metrics, studentName);
GPA = compute_gpa(metrics, grades);

output(nameCOurse, metrics,studentName, GPA, grades);

cout << "Results written to output.txt\n";
return 0;
}

void input(char **nameCOurse, float **metrics, char* studentName){
int i = 0;
ifstream inFile;
inFile.open("input.txt");

studentName = new char[256];
inFile.getline(studentName, 100);
nameCOurse[i] = new char[256];
string line;
while(inFile.getline(nameCOurse[i], 1000)){
inFile >> metrics[i][0] >> metrics[i][1];
nameCOurse[++i] = new char[256];
inFile.ignore();
}

size = i;
}

int compute_gpa(float **metrics, char* grades){

float sum_of_gpa = 0;
float sum_of_cre = 0;

for(int i=0; i< size; i++){
if(metrics[i][0] >= 90 && metrics[i][0] <= 100){
metrics[i][2] = metrics[i][1]*4;
grades[i] = 'A';
}
else if(metrics[i][0] >= 80 && metrics[i][0] <= 89){
metrics[i][2] = metrics[i][1]*3;
grades[i] = 'B';
}
else if(metrics[i][0] >= 70 && metrics[i][0] <= 79){
metrics[i][2] = metrics[i][1]*2;
grades[i] = 'C';
}
else if(metrics[i][0] >= 60 && metrics[i][0] <= 69){
metrics[i][2] = metrics[i][1];
grades[i] = 'D';
}
else if(metrics[i][0] >= 0 && metrics[i][0] <= 59){
metrics[i][2] = 0;
grades[i] = 'F';
}
else{
cout << "Wrong Input";
}

sum_of_gpa = sum_of_gpa + metrics[i][2];
sum_of_cre = sum_of_cre + metrics[i][1];
}

return sum_of_gpa/sum_of_cre;
}

void output(char** nameCOurse, float** metrics, char* studentName, float GPA, char* grades)
{
ofstream outFile("output.txt");

outFile.setf(ios::left, ios::adjustfield);
outFile.width(10);
outFile << "Course";
outFile.setf(ios::left, ios::adjustfield);
outFile.width(7);
outFile << "Grades";
outFile.setf(ios::left, ios::adjustfield);
outFile.width(7);
outFile << "GPA";
outFile.setf(ios::left, ios::adjustfield);
outFile.width(7);
outFile << "Credits\n";

for(int i=0; i< size; i++){
outFile.setf(ios::left, ios::adjustfield);
outFile.width(10);
outFile << nameCOurse[i];
  
outFile.setf(ios::left, ios::adjustfield);
outFile.width(7);
outFile << grades[i];

outFile.setf(ios::left, ios::adjustfield);
outFile.width(7);
outFile << metrics[i][2];

outFile.setf(ios::left, ios::adjustfield);
outFile.width(7);
outFile << metrics[i][1] << "\n";
}

outFile.precision(4);
outFile << "Semester GPA : " << GPA << endl;
outFile.close();

return;
}


input.txt
Jon P. Washington, Jr.
Computer Science I
81 4
PreCalculus
75 3
Biology I
88 5
English II
100 3
Psychology I
68 3

output.txt
Course Grades GPA Credits
Computer Science IB 12 4
PreCalculusC 6 3
Biology I B 15 5
English IIA 12 3
Psychology ID 3 3
Semester GPA : 2

Terminal 四 1回(2:47, 72%) 11:16 AM ※ubuntu new. py new.cpP input.txt output.txt nums.txt songs.dat 2 I/below is code written in C++ to perform as per the requirement ubuntu@ayushv: /Desktop/codes/HomeworkLibsolution /NOTE:1 Please note that the below prograns have been tested on ubuntuubuntu ayushv:-/Desktop/codes/HomeworkLibsolution$ cat input.txt Jon P. Washington, Jr Computer Science I 81 4 PreCalculus 75 3 Biology I 88 5 English II 100 3 Psychology I 68 3ubuntueayushv: /Desktop/codes/HomeworkLibsolution 6 C++ code 7 #include<iostream> 8 9 10 11 12 13 14 15 16 #include«tstream» #include <10man 1 p> #include<string.h> #1nclude algorithms #include«vector» #include <stdio.h> #include<stdlib.h> #include<math.h> using namespace std: u ayushv:-/Desktop/codes/HomeworkLibsoLuti 18 int size 0; 19 28 void input(char**, tloat*, char 21 void output(char**. float" , char黑 , float, char*) ; 22 int conpute gpa(float**.char): ubuntucayushv: /Des ubuntu ayushv: /Des Results written to output.txt ubuntu@ayushv:-/D ubuntucayushv: /Des ubuntu ayushv: ubuntueayushv: /Desktop/codes/HomeworkLibsolutions cat output.txt Course Grades GPACredits Computer Science IB PreCalculusC Biology I B English IIA Psychology ID Semester GPA: 2 odes/HomeworkLibsolutio g new.cpp $./a.out HomeworkLibsoluti Desktop/codes/HomeworkLibsolutio codes/HomeworkLibsoluti -/Desktop/codes/HomeworkLibsoluti 24 1nt main char studentNane; chart grades new charf1ej: char *naneCOurse new char [101: float **metrics - new float*[10]: float GPA 27 12 29 30 15 12 32 for(int 1-: 1<18: 1++) metrics[ilnew float[3]: ubuntucayushv: /Desktop/codes/HomeworkLibsolution$ 34 35 36 37 38 39 48 input (namecOurse, netrics, studentName GPA compute gpa (nctrics, grades): output (naneCourse, netrics,studentName, GPA, grades) cout << "Results written to output.txtin; return 43 45 46 47 48 49 50 void input (char int i 8 ifstrean inFile: inFile.open( "input.txt) *"namecourse. float **metrics. charォ studentNane){ studentNamenew char [256]: inFile.getline(studentName, 168): nanecourse[1]-new char[2561 string line: lab Size: 4