Question

Modify Assignment #18 so it drops each student’s lowest score when determining the students’ test score average and Letter grade. No scores less than 0 or greater than 100 should be accepted

#include<iostream>
#include<string>

using namespace std;

int main()

{

double average[5];
string name[5];
char grade[5];

for(int i=0; i<=5; i++)

{

cout<<"Enter student name: ";
cin.ignore();
getline(cin,name[i]);

int sum=0;

for(int j=0; j<5; j++)
{
int grades;
cout<<"Enter Grades:"<<j+1<<" : ";
cin>>grades;
sum+=grades;
}

average[i]=(float)sum/5;

if(average[i]>=90 && average[i]<=100)
grade[i]='A';

else if(average[i]>=80 && average[i]<=89)
grade[i]='B';

else if(average[i]>=70 && average[i]<=79)
grade[i]='C';

else if(average[i]>=60 && average[i]<=69)
grade[i]='D';

else if(average[i]>=0 && average[i]<=59)
grade[i]='F';

}

cout<<"Name\tAverage\tMarks"<<endl;

for(int i=0; i<5; i++)
{
cout<<name[i]<<"\t"<<average[i]<<"\t"<<grade[i]<<endl;
}

}

Answer 1

#include<iostream>
#include<string>

using namespace std;

int main()

{

double average[5];
string name[5];
char grade[5];

for(int i=0; i<5; i++)

{

cout<<"Enter student name: ";
cin.ignore();
getline(cin,name[i]);

int sum=0;
int min=100;
for(int j=0; j<5; j++)
{
int grades;
cout<<"Enter Grades:"<<j+1<<" : ";
cin>>grades;
//checking whether grade is less than 0 or greater than 100
if(grades<0 || grades>100){//if condition satisfies re-entering  the value
cout<<"Invalid grades!!! Please re-enter\n";
j--;
}

else{
sum+=grades;
if(min > grades){//storing minimum grade in min variable
min = grades;
}
}
}
sum = sum - min;//dropping minimum grade
average[i]=(float)sum/4;//now average is taken from 4 grades

if(average[i]>=90 && average[i]<=100)
grade[i]='A';

else if(average[i]>=80 && average[i]<=89)
grade[i]='B';

else if(average[i]>=70 && average[i]<=79)
grade[i]='C';

else if(average[i]>=60 && average[i]<=69)
grade[i]='D';

else if(average[i]>=0 && average[i]<=59)
grade[i]='F';

}

cout<<"Name\tAverage\tMarks"<<endl;

for(int i=0; i<5; i++)
{
cout<<name[i]<<"\t"<<average[i]<<"\t"<<grade[i]<<endl;
}

}

OUTPUT :

Hope this helps you!!!