Read the file with grades and do the following:

Write a loop to:
◦Read each record
◦Calculate the letter grade
◦Determine who has and what is the highest score.
◦Write to out.txt as shown below, formatting output so columns line up.

After the loop, output what is and who has the highest score.

Highest Score: 100 Mary Marvelous

Mark Simpsonite 95
Mary Marvelous 100
Milton Hamilton 82
Marvin Wilshire 76
Myrtle Millford 92

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struct record{
    string first_name;
    string last_name;
    int score;   

bool readfile(string filename, record r [], int & size);
bool HighestScore(record r [], int size, record & hs);
char grade(int score);
bool writefile(string filename, record r [], int size, record hs);

int main(int argc, char** argv) {
    record r [100];
    int size;
    string in_file = "lab5inFile";
    // read file
    if (!readfile(in_file,r,size)) {
       cout<<"Cannot open file "<<in_file<<" \n";
       return 1;
    record hs;// student who has highest score   
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