Struct help with error! Short!

[Psycosiis]

Hey guys I am getting a LNK2019 error aka unresolved external symbol

  #include <stdio.h>
#include <string>
#include <cstdlib>
#include <iostream>


using namespace std;

enum departmentSchool {
	History, ComputerScience, LiberalArts, Math, Biology
};
enum daysOfTheWeek {
	M, T, W, R, F
};


struct Courses {
	string courseID;
	departmentSchool department;
	daysOfTheWeek day;
	int time;
	int credits;
	int enrollment;

};

void find_courses(Courses all[], Courses result[], Courses a);


Courses get_course_info();


void print_course_info(Courses all[]);


void get_max_enrollment(Courses all[]);

void get_least_credits(Courses all[]);




int main() {

	string exit;
	Courses all[10];
	Courses result[3];
	Courses a;

	do {
		for (int i = 0; i < 10; i++) {
			Courses temp = get_course_info();
			all[i] = temp;
		}

		get_max_enrollment(all);

		get_least_credits(all);


		std::cout << "Please enter the Department of the course. (0 = History 1 = ComputerScience 2 = LiberalArts 3 = Math 4 = Biology" << endl;

		int control = 0;

		while (control < 1) {
			int dep;
			std::cin >> dep;

			if (a.department == History || ComputerScience || LiberalArts || Math || Biology) {
				a.department = (departmentSchool)dep;
				control += 1;

			}
			else {
				std::cout << " Please re-enter the course department correctly \n";

			}

		}

		std::cout << "Please enter the Course Day of the week." << endl;

		control = 0;

		while (control < 1) {
			int day;
			std::cin >> day;

			if (a.department == M || T || W || R || F) {
				a.day = (daysOfTheWeek)day;
				control += 1;

			}
			else {
				std::cout << " Please re-enter the course day correctly (remember to use capital letter) \n";

			}

		}

		std::cout << "Please enter the Course Start Time" << endl;

		control = 0;

		while (control < 1) {
			std::cin >> a.time;

			if (a.time == 8 || 9 || 12 || 3 || 6) {
				control += 1;

			}
			else {
				std::cout << " Please re-enter the course time correctly \n";

			}

		}

		void find_courses(Courses& all, Courses& result, Courses a);


	} while (exit != "q" || "Q");


	return 0;
}

void find_courses(Courses all[], Courses result[], Courses a) {
	int sizeResult = 0;
	for (int i = 0; i < 10; i++) {
		if (all[i].department == a.department && all[i].day == a.day && all[i].time == a.time) {
			if (sizeof(result) < 3) {
				result[sizeResult] = all[i];
				sizeResult++;
			}
			else {
				std::cout << "There are more than 3 matches, Please look over Student Course Selection Guide";
			}

		}

	}

	if (sizeResult == 0) {
		std::cout << "No matches occured, Please try again" << endl;
	}

	if (sizeResult > 0 && sizeResult < 4) {
		for (int i = 0; i < sizeResult; i++) {
			print_course_info(result);
		}
	}

};


Courses get_course_info() {

	Courses temp;

	std::cout << "Please enter a Course ID (use 5 digits than last the semester character*Capitalized* " << endl;

	int control = 0;

	while (control < 1) {
		std::cin >> temp.courseID;

		if (temp.courseID[6] == 'F' || 'S' || 'U') {
			control += 1;

		}
		else {
			std::cout << " Please re-enter the course ID correctly (Remember to use Capital letter for semester) \n";

		}

	}

	std::cout << "Please enter the Department of the course." << endl;

	control = 0;

	while (control < 1) {
		int dep;
		std::cin >> dep;

		if (temp.department == History || ComputerScience || LiberalArts || Math || Biology) {
			temp.department = (departmentSchool)dep;
			control += 1;

		}
		else {
			std::cout << " Please re-enter the course department correctly \n";

		}

	}

	std::cout << "Please enter the Course Day of the week." << endl;

	control = 0;

	while (control < 1) {
		int day;
		std::cin >> day;

		if (temp.day == M || T || W || R || F) {
			temp.day = (daysOfTheWeek)day;
			control += 1;

		}
		else {
			std::cout << " Please re-enter the course day correctly (remember to use capital letter) \n";

		}

	}

	std::cout << "Please enter the Course Start Time" << endl;

	control = 0;

	while (control < 1) {
		std::cin >> temp.time;

		if (temp.time == 8 || 9 || 12 || 3 || 6) {
			control += 1;

		}
		else {
			std::cout << " Please re-enter the course time correctly \n";

		}

	}

	std::cout << "Enter the amount of credits \n";
	std::cin >> temp.credits;

	std::cout << "Enter the Enrollment limit";
	std::cin >> temp.enrollment;


	return temp;

}

void print_course_info(Courses all)
{
	std::cout << "Course ID: " << all.courseID << endl;
	std::cout << "Course Department: " << all.department << endl;
	std::cout << "Course Days of the week: " << all.day << endl;
	std::cout << "Course Time Start: " << all.time << endl;
	std::cout << "Course Credits: " << all.credits << endl;
	std::cout << "Course Enrollment Limit: " << all.enrollment << endl;
}


void get_max_enrollment(Courses all[]) {
	Courses temp;
	temp.enrollment = 0;
	for (int i = 0; i < sizeof(all); i++) {
		if (all[i].enrollment > temp.enrollment) {
			temp = all[i];
		}
	}

	std::cout << "The class with the largest enrollment is " << temp.courseID << endl;
}

void get_least_credits(Courses all[]) {
	Courses temp;
	temp.credits = 0;
	for (int i = 0; i < sizeof(all); i++) {
		if (all[i].credits < temp.credits) {
			temp = all[i];
		}
	}

	std::cout << "The class with the least amount of credits is " << temp.courseID << endl;
}

This is the entire code but the portion causing the error is

void print_course_info(Courses all[]);

If anyone could explain to me what is wrong and how to fix it I'd appreciate it.

[TarikNeaj]

Courses result[3]; // This is an array

print_course_info(result); // Here you call the function giving it the array as an argument

void print_course_info(Courses all) // Here you are, not taking in array "result" as an array.

std::cout << "Course ID: " << all.courseID << endl; // Nor do you use it as an array

[coder777]

In other words: The prototype of print_course_info(...) does not match the implementation due to the missing [].

A loop like this does not work (line 262/274):

for (int i = 0; i < sizeof(all); i++) {

all is implicitly converted to a pointer, hence the sizeof will return the size of the pointer. You need to pass the number of elements besides the array.

Something like this doesn't work either:

if (temp.time == 8 || 9 || 12 || 3 || 6) {

It needs to be:

if (temp.time == 8 || temp.time == 9 || etc.) {