Grade Book Modification- C++ Modify the grade book application so that it drops each students lowest score when determing the test scre averages and letter grades.

grade book application:

#include

#include

#include

using namespace std;

char letterGrade(double score);

int main()

{

char names[5][25]; //student names

char grades[5]; //letter grades

double scores[5][4]; //test scores

double avgScore[5]; //average of 4 test scores

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

{

cout<<" Enter student "<<(i+1)<<" name: ";

cin>>names[i];

cout<<"Enter his 4 scores: ";

for(int j=0;j<4;j++)

{

cin>>scores[i][j];

while(scores[i][j] > 100 || scores[i][j] <0)

{

cout<<" test score should between 0 and 100"<

cout<<"enter test score: ";

cin>>scores[i][j];

}

}

}

//finding average score of each student

//and letter grade

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

{

avgScore[i] = 0;

for(int j=0;j<4;j++)

avgScore[i] += scores[i][j];

avgScore[i] /= 4;

grades[i] = letterGrade(avgScore[i]);

}

//displaying average test score and letter grade

cout<<" Student Name\tAverage Score\tLetter Grade"<

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

{

cout.setf(ios::fixed,ios::floatfield);

cout.precision(2);

cout<

}

return 0;

}

//return letter grade based on the test score

//passed as parameter

char letterGrade(double score)

{

if(score >= 90 && score <=100)

return 'A';

else if(score >= 80 && score <90)

return 'B';

else if(score >= 70 && score <80)

return 'C';

else if(score >= 60 && score <70)

return 'D';

else

return 'F';

}