Homework Assignment 2 Due on Sunday 18 March 2018 Write a C++ program that start

Question

Homework Assignment 2 Due on Sunday 18 March 2018 Write a C++ program that starts by reading student information from an input file student.txt organized as follows: each student has four fields of information on one line of the input file: name at most 25 characters, terminated by acharacter), ID (integer), cohort (integer), and three scores (each score is an integer between 0 and 100)·The program must store this information in two parallel arrays. The first array i array is a two-dimensional array of integers with 5 columns for the ID, the cohort and the 3 scores. The program must calculate for each student a letter grade (and store it a third parallel array of characters) based on the average of his/her three scores according to the following criteria: I array of strings for the names. The second s a o Average of 90 80 and

Explanation / Answer

#include<iostream>

#include<string>

#include<fstream>

#include<stdlib.h>

using namespace std;

int compare(const void *a, const void *b) {

int *arr1 = (int*)a;

int *arr2 = (int*)b;

if (arr1[0] < arr2[0])

return 1;

else

return 0;

}

int **arr;

string *name;

char* grade;

int compare1(const void * a, const void * b) {

double diff = arr[*(int*)a] - arr[*(int*)b];

return (0 < diff) - (diff < 0);

}

void SortInfo(int NUM)

{

qsort(arr, NUM, sizeof(*arr), compare);

qsort(name, NUM, sizeof(name), compare1);

qsort(grade, NUM, sizeof(grade), compare1);

}

int SeqSearch(int ID,int NUM)

{

for (int i = 0; i < NUM; i++)

{

if (arr[i][0] == ID)

return i;

}

return -1;

}

int BinSearch(int ID, int NUM)

{

int l = 0, h = NUM - 1;

while (l <= h)

{

int mid = (l + h) / 2;

if (arr[mid][0] == ID)

return mid;

else if (arr[mid][0] > ID)

h = mid - 1;

else

l = mid + 1;

}

return -1;

}

void DisplayStudent(int ID, int NUM)

{

for (int i = 0; i < NUM; i++)

{

if (arr[i][0] == ID)

{

cout << name[i] << " " << arr[i][0] << " " << arr[i][1] << " " << arr[i][2] << " " << arr[i][3] << " " << arr[i][4] << " " << grade[i] << endl;

break;

}

}

}

void PrintReport(int NUM)

{

cout << "NAME ID COHORT GRADE ";

cout << "-------- -------- ----- -- ";

for (int i = 0; i < NUM; i++)

{

cout << name[i] << " " << arr[i][0] << " " << arr[i][1] << " " << arr[i][2] << " " << arr[i][3] << " " << arr[i][4] << " " << grade[i] << endl;

}

}

void ReadInfo()

{

std::string line;

std::ifstream myfile("student.txt");

int r = 0, c = 0;

while (std::getline(myfile, line))

{

string nameValue;

int i = 0;

while (line[i] != '/')

i++;

nameValue = line.substr(0, i);

name[r] = nameValue;

i++;

string ID, cohort, score1, score2, score3;

int j = i;

while (line[i] != ' ')

i++;

ID = line.substr(j, i - 1);

i++;

j = i;

while (line[i] != ' ')

i++;

cohort = line.substr(j, i - 1);

i++;

j = i;

while (line[i] != ' ')

i++;

score1 = line.substr(j, i - 1);

i++;

j = i;

while (line[i] != ' ')

i++;

score2 = line.substr(j, i - 1);

i++;

j = i;

while (line[i] != ' ')

i++;

score3 = line.substr(j, i - 1);

c = 0;

arr[r][c++] = atoi(ID.c_str());

arr[r][c++] = atoi(cohort.c_str());

arr[r][c++] = atoi(score1.c_str());

arr[r][c++] = atoi(score2.c_str());

arr[r][c++] = atoi(score3.c_str());

r++;

}

}

int main()

{

int NUM = 0;

std::string line;

std::ifstream myfile("student.txt");

while (std::getline(myfile, line))

++NUM;

std::cout << "Number of lines in text file: " << NUM;

name = (string*)malloc(sizeof(25)*NUM);

arr = (int **)malloc(NUM * sizeof(int *));

for (int i = 0; i<NUM; i++)

arr[i] = (int *)malloc(5 * sizeof(int));

ReadInfo();

grade = (char*)malloc(sizeof(char)*NUM);

double avg;

for (int i = 0; i < NUM; i++)

{

int sum = 0;

for (int j = 2; j < 4; j++)

{

sum += arr[i][j];

}

avg = sum / 3;

if (avg >= 90)

grade[i] = 'A';

else if (avg >= 80)

grade[i] = 'B';

else if (avg >= 70)

grade[i] = 'C';

else if (avg >= 60)

grade[i] = 'D';

else

grade[i] = 'F';

}

SortInfo(NUM);

PrintReport(NUM);

system("pause");

return 0;

}

Related Questions

Navigate

• Browse (All)
• Browse H
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.