Answer to Question #195849 in C++ for SWB

Question

1.    : Implement a program in C++ that accepts 5 marks and prints out their corresponding grades. The program should calculate the average mark, find the greatest and also the least mark. The program uses a user defined function

grade ( ). you can use any previous concepts like Loop, Arrays, If else and Switch etc.

Answer 1

#include <iostream>
#include <string>


using namespace std;
string grade(int mark);


int main (){
	int marks[5];
	//accepts 5 marks
	for(int i=0;i<5;i++){
		marks[i]=-1;
		while(marks[i]<0 || marks[i]>100){
			cout<<"Enter mark "<<(i+1)<<" [0-100]: ";
			cin>>marks[i];
		}
	}
	int greatestMark=marks[0];
	int leastMark=marks[0];
	float averageMark=0;
	float sumMarks=0;
	cout<<"Mark\tGrade\n";
	for(int i=0;i<5;i++){
		//prints corresponding grades
		cout<<marks[i]<<"\t"<<grade(marks[i])<<"\n";
		sumMarks+=marks[i];
		//find the greatest and also the least mark.
		if(marks[i]>greatestMark){
			greatestMark=marks[i];
		}
		if(marks[i]<greatestMark){
			leastMark=marks[i];
		}
	}
	//calculate the average mark
	averageMark=sumMarks/5.0;


	cout<<"\nThe average mark: "<<averageMark<<"\n";
	cout<<"The least mark: "<<leastMark<<"\n";
	cout<<"The greatest mark: "<<greatestMark<<"\n";
	


	system("pause");
	return 0;
}


string grade(int mark){
	if(mark>=90){
		return "A";
	}
	if(mark>=80){
		return "B";
	}
	if(mark>=70){
		return "C";
	}
	if(mark>=60){
		return "D";
	}
	return "F";
}