Question

Write a program that:

1. Declare the structure named student composed of id (int), first (string), last (string), and grade (float).
2. Asks the user for the name of the input file.
3. Reads the grades from the file to fill up an array of type student.

Answer 1

The student's question is about writing a program in C++ that defines a structure to manage student data, reads user input to get a file name, and then processes the file to fill an array with student information.

Step-by-step explanation:

The student's question involves writing a program that accomplishes a set of tasks related to handling student information in a structure. The program should declare a student structure including an id, first name, last name, and grade. Then it asks for an input file from the user and reads the grades from that file to populate an array of the student structure. Let's look at a simple example in C++:

struct student {
int id;
std::string first;
std::string last;
float grade;
};

int main() {
std::string fileName;
std::cout << "Enter the name of the input file: ";
std::cin >> fileName;

std::ifstream inputFile(fileName);
if (!inputFile.is_open()) {
std::cerr << "Could not open the file." << std::endl;
return 1;
}

std::vector students;
student temp;
while (inputFile >> temp.id >> temp.first >> temp.last >> temp.grade) {
students.push_back(temp);
}

inputFile.close();
return 0;
}

Ensure that you've included the necessary headers such as <iostream>, <fstream>, <string>, and <vector> to compile the program correctly.