C++ code

[Ralejoe John]

please help me with the code below.. the program should be able to perform the below 8 tasks from add student record to exit..
record should be recorded using the below details starting with the automating roll number(S1001) and also insert the marks scored in the subjects stated.. please use structure and functions.


1. Add Student Record
2. Display Student Record
3. Modify Student Record
4. Search Student Record
5. Delete Student Record
6. Generate Student Report Card
7. Display all students records with Class average
8. Exit




Roll number of a Student : S1001
Enter Student Name :
Enter Student Grade/Class :
Enter Marks Scored in English out of 100 :
Enter Marks Scored in French out of 100 :
Enter Marks Scored in Sesotho out of 100 :
Enter Marks Scored in Maths out of 100 :
Enter Marks Scored in Science out of 100 :
Enter Marks Scored in Social out of 100 :

[seeplus]

As this is in the Jobs section, what payment is being offered?

[deleted account xyzzy]

Double posting isn't going to get help any faster.
http://www.cplusplus.com/forum/general/275137/

Especially when you just dump your assignment without even an attempt to write code to solve it, expecting us to do all the work for you.

[Ganado]

OP moved the thread to General. Guess that means no payment is being offered. :(
If you change your mind, I suggest offering BTC or ETH.

[Handy Andy]

Hello Ralejoe John,

Since you have offered no code or said what you have learned it would be futile to ask if you know about functions.

I would suggest starting with creating and displaying a menu and collecting the menu choice.

Keeping I would first do some planning on what and how the program should work.

Work in small steps. Do 1 thing at a time, compile and test often until it is working the way that you want.

Post your code and go from there.

Andy

P.S. Be prepared for answers beyond what you know.

[Handy Andy]

Hello Ralejoe John,

Given this line Enter Student Grade/Class :. What type of information would the variable hold?

And for an entry of Enter Marks Scored in English out of 100 :. Would this be a whole number or a floating point number?

Andy

[seeplus]

As it's New Year, for your starter for 10 (UK quiz program) a possible implementation could be:

#include <iostream>
#include <string>
#include <map>
#include <array>
#include <limits>
#include <sstream>

constexpr std::array topics {"English", "French", "Sesotho", "Maths", "Science", "Social"};

unsigned getInt(const std::string& prm)
{
	unsigned i {};

	while ((std::cout << prm) && !(std::cin >> i)) {
		std::cout << "Invalid integer\n";
		std::cin.clear();
		std::cin.ignore(std::numeric_limits<std::streamsize>::max(), '\n');
	}

	std::cin.ignore(std::numeric_limits<std::streamsize>::max(), '\n');
	return i;
}

class Students {
public:
	bool getInput() {
		Record rec(newRoll());
		const std::string studNum {"S" + std::to_string(rec.snum)};

		std::cout << "\nEnter data for student " << studNum << '\n';
		std::cout << "Name (CR to finish): ";
		std::getline(std::cin, rec.name);

		if (rec.name.empty())
			return false;

		std::cout << "Grade/Class: ";
		std::getline(std::cin, rec.grade);

		for (size_t t = 0; t < topics.size(); ++t) {
			std::ostringstream oss;

			oss << "Enter mark for " << topics[t] << " out of 100: ";

			do
				rec.marks[t] = getInt(oss.str());
			while ((rec.marks[t] > 100) && (std::cout << "Invalid mark\n"));
		}

		students[studNum] = rec;
		return true;
	}

	friend std::ostream& operator<<(std::ostream& os, const Students& st);

private:
	struct Record {
		unsigned snum {};
		std::string name;
		std::string grade;
		std::array<unsigned, topics.size()> marks {};

		Record() {}
		Record(unsigned roll) : snum(roll) {}
	};

	std::map<std::string, Record> students;

	unsigned newRoll() const { return students.empty() ? 1001 : students.rbegin()->second.snum + 1; }

	static std::ostream& disRec(std::ostream& os, const Record& rec) {
		os << "Name: " << rec.name << '\n' << "Grade/Class: " << rec.grade << '\n';

		for (size_t t = 0; t < topics.size(); ++t)
			os << "Mark scored for " << topics[t] << " is " << rec.marks[t] << '\n';

		return os;
	}
};

std::ostream& operator<<(std::ostream& os, const Students& st)
{
	for (const auto& s : st.students) {
		os << "\nStudent " << s.first << '\n';
		Students::disRec(os, s.second);
	}

	return os;
}

unsigned menu()
{
	std::cout << '\n';
	std::cout << "1. Add Student Record\n";
	std::cout << "2. Display All Students\n";
	std::cout << "0. Exit\n";

	return getInt("Enter Option: ");
}

int main()
{
	Students students;

	while (true)
		switch (menu()) {
			case 1:
				while (students.getInput());
				break;

			case 2:
				std::cout << students << '\n';
				break;

			case 0:
				return 0;

			default:
				std::cout << "Unknown option\n";
				break;
		}
}

The other options are quite easily added.