Question

I need this problem solved in C++ progamming

Answer 1

Using the knowledge in computational language in C++ it is possible to write a code that prompt user for a file name and read the data containing information for a course, store and process the data

Writting in C++ code:

#include<iostream>

#include<cstring>

#include<fstream>

using namespace std;

struct Student{

string lastName,firstName;

char subject;

int marks1,marks2,marks3;

};

char calcGrade(double avg){

char grade;

if(avg>=90.0&&avg<=100.0)

grade='A';

else if(avg>=80&&avg<=89.99)

grade='B';

else if(avg>=70&&avg<=79.99)

grade='C';

else if(avg>=60&&avg<=69.99)

grade='D';

else

grade='E';

return grade;

}

int main(){

char inFilename[20],outFilename[20];

int noOfRec,i,sum,count;

double avg,classAvg;

char grade;

cout<<"Please enter the name of the input file: ";

cin>>inFilename;

cout<<"Please enter the name of the output file: ";

cin>>outFilename;

ifstream ifile;

ifile.open(inFilename);

ofstream ofile;

ofile.open(outFilename);

if(!ifile){

cout<<inFilename<<" cannot be opened";

return -1;

}else{

ifile>>noOfRec;

struct Student s[noOfRec];

for(i=0;i<noOfRec;i++){

ifile>>s[i].lastName,s[i].firstName,s[i].subject,s[i].marks1,s[i].marks2,s[i].marks3;

}

if(!ofile){

cout<<outFilename<<" cannot be opened";

}else{

ofile<<"Student Grade Summary\n";

ofile<<"---------------------\n";

ofile<<"ENGLISH CLASS\n";

ofile<<"Student name\tTest Avg\n";

sum=0;

count=0;

classAvg=0.0;

for(i=0;i<noOfRec;i++){

if(s[i].subject=='E'){

avg=(s[i].marks1+s[i].marks2+s[i].marks3)/3;

grade=calcGrade(avg);

ofile<<s[i].firstName<<" "<<s[i].lastName<<"\t"<<avg<<"\t"<<grade<<"\n";

sum+=avg;

count+=1;

}

}

classAvg=sum/count;

ofile<<"\n\t\tClass Average\t\t"<<classAvg<<"\n";

ofile<<"---------------------\n\n";

ofile<<"HISTORY CLASS\n";

ofile<<"Student name\tTest Avg\n";

sum=0;

count=0;

classAvg=0.0;

for(i=0;i<noOfRec;i++){

if(s[i].subject=='H'){

avg=(s[i].marks1+s[i].marks2+s[i].marks3)/3;

grade=calcGrade(avg);

ofile<<s[i].firstName<<" "<<s[i].lastName<<"\t"<<avg<<"\t"<<grade<<"\n";

sum+=avg;

count+=1;

}

}

classAvg=sum/count;

ofile<<"\n\t\tClass Average\t\t"<<classAvg<<"\n";

ofile<<"---------------------\n\n";

ofile<<"MATH CLASS\n";

ofile<<"Student name\tTest Avg\n";

sum=0;

count=0;

classAvg=0.0;

for(i=0;i<noOfRec;i++){

if(s[i].subject=='M'){

avg=(s[i].marks1+s[i].marks2+s[i].marks3)/3;

grade=calcGrade(avg);

ofile<<s[i].firstName<<" "<<s[i].lastName<<"\t"<<avg<<"\t"<<grade<<"\n";

sum+=avg;

count+=1;

}

}

classAvg=sum/count;

ofile<<"\n\t\tClass Average\t\t"<<classAvg<<"\n";

ofile<<"---------------------\n\n";

ifile.close();

ofile.close();

}

}

See more about C++ code at brainly.com/question/19705654

#SPJ1