Write a program that finds out the grade of a student based on the average marks obtained in three subjects. The grade is calculated as;
// If average is greater than 80, grade is A.
// If average is less than 80 and greater than 60, grade is B.
// If average is less than 60 and greater than 33, grade is C.
// If average is less than 33, grade is F.

We learn Programming to solve problems using Computers. A Computer Program is the set of instructions that are given to a computer so that it can solve problems. To solve problems is our primary goal in Computer Science.

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A Compiler is computer software that is used to convert a C++ language program to a computer’s native language which is binary language. It is a translator program. It is used to convert Source Code into Object Code.

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Any instruction that is written in High-Level Language i.e. C++ or C is known as Source Code.

What is Object Code?

Any Code that is written in Low-Level Language i.e. Assembly Language or Binary Language is known as Object Code.

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So let’s Write Code:

Write a program that finds out the grade of a student based on the average marks obtained in three subjects. The grade is calculated as;
// If average is greater than 80, grade is A.
// If average is less than 80 and greater than 60, grade is B.
// If average is less than 60 and greater than 33, grade is C.
// If average is less than 33, grade is F.

#include"iostream"
using namespace std;
main()
{
int s1, s2, s3, average;
char grade;

cout<<"Enter the marks of subject 1 ? ";
cin>>s1;
cout<<"Enter the marks of subject 2 ? ";
cin>>s2;
cout<<"Enter the marks of subject 3 ? ";
cin>>s3;
average = (s1 + s2 + s3)/3; 
if(average >= 80 && average <=100)
{
grade = 'A';
}
else if (average >= 60 && average < 80)
{
grade= 'B';
}
else if(average >= 33 && average <60)
{
grade ='C';
}
else if(average>= 0 && average <33)
{
grade='F';
}
cout<<"Average marks =" <<average<<endl;
cout<<"Grade =" <<grade;
}

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