Question

(a) Write a program which calculates and displays the obtained marks, percentage in six subjects and assigns grades based on percentage obtained by a student.

i. if the percentage is above 90, assign grade A
ii. if the percentage is above 75, assign grade B+
iii. if the percentage is above 70, assign grade B
iv. if the percentage is above 65, assign grade C+
v. if the percentage is above 60, assign grade C
vi. if the percentage is above 55, assign grade D+
vii. if the percentage is less than 50, assign grade F
(Hint: using logical operators)
c++ programming

Answer 1

The program in C++ is as follows:

#include <iostream>

using namespace std;

int main(){

int scores[6];

int sum =0;

string grade;

for(int i =0; i < 6; i++){

cin>>scores[i];

sum+=scores[i]; }

double percent = sum/6.0;

if(percent > 90){ grade ="A"; }

else if(percent>75){ grade ="B+"; }

else if(percent>70){ grade ="B"; }

else if(percent>65){ grade ="C+"; }

else if(percent>60){ grade ="C"; }

else if(percent>55){ grade ="D+"; }

else if(percent<50){ grade ="F"; }

cout<<grade;

return 0;

}

Step-by-step explanation:

This declares the 6 scores using an array

int scores[6];

This initializes the sum of all scores to 0

int sum =0;

This declares the grade as string

string grade;

This iterates through the scores

for(int i =0; i < 6; i++){

This gets input for each score

cin>>scores[i];

This adds up the scores

sum+=scores[i]; }

This calculates the percentage

double percent = sum/6.0;

The following if statements determine the grade

if(percent > 90){ grade ="A"; }

else if(percent>75){ grade ="B+"; }

else if(percent>70){ grade ="B"; }

else if(percent>65){ grade ="C+"; }

else if(percent>60){ grade ="C"; }

else if(percent>55){ grade ="D+"; }

else if(percent<50){ grade ="F"; }

This prints the grade

cout<<grade;