Write a program to compute the total score and assign letter grades to students

Question

Write a program to compute the total score and assign letter grades to students for a course.
The total score is a weighted sum of grades from five quizzes, five homeworks, and three
exams. The break-up of the grades is as follows:
Quizzes (10%) : Each of the 5 quizzes will comprise 2% of the total score
Homeworks (30%) : Each of the 3 homeworks will comprise 10% of the total score
Exams (60%) : Each of the 3 exams will comprise 20% of the total score
Scores for each student are presented on a single row in the input file as follows:
Student ID Q1 Q2 Q3 Q4 Q5 HW1 HW2 HW3 E1 E2 E3
Input File Weighted Sum of Scores for Quizzes,
Homeworks and Exams
For example for input line 2 above, 11968 71 49 85 87 53 99 82 47 70 69 54
Student ID = 11968
Q1 score = 71
Q2 score = 49
Q3 score = 85
Q4 score = 87
Q5 score = 53
HW1 score = 99
HW2 score = 82
HW3 score = 47
E1 score = 70
E2 score = 69
E3 score = 54
Weighted Scores can then be determined as follows
Quiz score = 71*0.02 + 49*0.02 + 85*0.02 + 87*0.02 + 53*0.02 = 6.9
HW score = 99*0.1 + 82*0.1 + 47*0.1 = 22.8
Exam score = 70*0.2 + 69*0.2 + 54*0.2 = 38.6
Total = 6.9+22.8+38.6 = 68.3
Once you have the weighted total computed, assign a letter grade using the following grade
scale: 90%99%, A; 80%89%, B; 70%79%, C; 60%69%, D; and 0%59%, F. You can
use a if else chain to assign letter grades, but if you use a switch statement to assign the
grades you will receive BONUS points. You should Format the output neatly in well-aligned
rows and columns and write the data to an output file as shown below:

Write a program to compute the total score and assign letter grades to students for a course. The total score is a weighted sum of grades from five quizzes, five homeworks, and three exams. The break-up of the grades is as follows: Quizzes (10%) : Each of the 5 quizzes will comprise 2% of the total score Homeworks (30%) : Each of the 3 homeworks will comprise 10% of the total score Exams (60%) : Each of the 3 exams will comprise 20% of the total score Scores for each student are presented on a single row in the input file as follows: Student ID Q1 Q2 Q3 Q4 Q5 HW1 HW2 HW3 E1 E2 E3 Input File Weighted Sum of Scores for Quizzes, Homeworks and Exams For example for input line 2 above, 11968 71 49 85 87 53 99 82 47 70 69 54 Student ID = 11968 Q1 score = 71 Q2 score = 49 Q3 score = 85 Q4 score = 87 Q5 score = 53 HW1 score = 99 HW2 score = 82 HW3 score = 47 E1 score = 70 E2 score = 69 E3 score = 54 Weighted Scores can then be determined as follows Quiz score = 71*0.02 + 49*0.02 + 85*0.02 + 87*0.02 + 53*0.02 = 6.9 HW score = 99*0.1 + 82*0.1 + 47*0.1 = 22.8 Exam score = 70*0.2 + 69*0.2 + 54*0.2 = 38.6 Total = 6.9+22.8+38.6 = 68.3 Once you have the weighted total computed, assign a letter grade using the following grade scale: 90% 99%, A; 80% 89%, B; 70% 79%, C; 60% 69%, D; and 0% 59%, F. You can use a if else chain to assign letter grades, but if you use a switch statement to assign the grades you will receive BONUS points. You should Format the output neatly in well-aligned rows and columns and write the data to an output file as shown below:

Explanation / Answer

#include<iostream>
#include<fstream>

using namespace std;

int main(){
ifstream infile;
infile.open("input.txt");
ofstream outfile;
outfile.open("output.txt");
int id;
double sum;
int score;
outfile << "Student Test Quiz Final Course Final ";
outfile << " ID Average Average Exam Average Grade ";
outfile << "------- --------- ------- ------ -------- -------- ";
cout << "Student Quiz Test Final Course Final ";
cout << " ID Average Average Exam Average Grade ";
cout << "------- --------- ------- ------ -------- -------- ";
while(!infile.eof()){
sum = 0;
int temp = 0;
infile >> id;
outfile <<" " << id ;
cout <<" " << id ;
for(int i= 0; i< 5; i++){
infile >> score;
temp += 0.02*(double)score;
}
outfile << " " << (double)temp/5;
cout << " " << (double)temp/5;
sum += temp;
temp = 0;
for(int i=0; i< 3; i++){
infile >> score;
temp += 0.1*(double)score;
}
outfile << " " << (double)temp/3;
cout << " " << (double)temp/3;
sum += temp;
temp = 0;
for(int i=0; i< 3; i++){
infile >> score;
temp += 0.2*(double)score;
}
outfile << " " << (double)temp/3;
cout << " " << (double)temp/3;
sum += temp;
temp = 0;
outfile << " " << sum;
cout << " " << sum;

temp = (int)sum/10;
switch(temp){
case 9:
cout <<" A ";
outfile <<" A ";
break;
case 8:
cout <<" B ";
outfile <<" B ";
break;
case 7:
cout <<" C ";
outfile <<" C ";
break;
case 6:
cout <<" D ";
outfile <<" D ";
break;
default :
cout <<" F ";
outfile <<" F ";
}
}
}

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