#include<stdio.h>
#include<stdlib.h>
#pragma warning (disable:4996)

void main()
{
	int subject, mark, student;
	float total = 0, average = 0;

	for(student=1; student<=3; student++){
		printf("Student No. %d\n", student);

	for (subject = 1; subject <= 3; subject++)
	{
		printf("Marks for Subject %d: ", subject);
		scanf("%d", &mark);
		total += mark;

	}

	average = total / 3;
	printf("Total mark= %.2f\n", total);
	printf("Average mark= %.2f\n", average);
	}
	
	system("pause");
}

#include <stdio.h>
#include <stdlib.h>

int main()
{
	int mark = 0, total = 0, hitot = 0, hstud = 0;

	for (int student = 1; student <= 3; student++) {
		printf("Student No. %d\n", student);

		for (int subject = 1; subject <= 3; subject++) {
			printf("Marks for Subject %d: ", subject);
			scanf("%d", &mark);
			total += mark;
		}

		printf("Total mark= %d\n", total);
		printf("Average mark= %.2f\n", total / 3.0);

		if (total > hitot) {
			hitot = total;
			hstud = student;
		}

		total = 0;
	}

	printf("THE HIGHEST TOTAL MARK IS %d\n", hitot);
	printf("THE TOP STUDENT IS STUDENT NO %d\n", hstud);

	//system("pause");
}

//#pragma warning (disable:4996)
#define _CRT_SECURE_NO_WARNINGS

#include<stdio.h>
#include<stdlib.h>

int main()  // <--- Changed.
{
	const int MAXSTUDENTS = 3;

	int highStudent = 0;  // <--- ALWAYS initialize all your variables.
	float highTotalMark = 0.0;

	for (int student = 0; student < MAXSTUDENTS; student++)
	{
		printf("Student No. %d\n", student + 1);  // <--- Changed.

		int scanfResult = 0, mark = 0;  // <--- Added. Moved "mark".
		float totalMarks = 0.0, average = 0.0;  // <--- Moved "average".

		for (int subject = 0; subject < MAXSTUDENTS; subject++)
		{
			printf("Marks for Subject %d: ", subject + 1);  // <--- Changed.

			scanfResult = scanf("%d", &mark);  // <--- Temporary fix. Working on something better.

			//if (!scanfResult && EOF);  // <--- Temporary fix. Working on something better. Not working right.
			//{
				//printf("\n     Error on input! Must be a number.\n     Start over!\n\n");

				//system("pause");

				//return 1;
		        //}

		average = totalMarks / MAXSTUDENTS;  // <--- Changed.

		printf("\nTotal mark = %.2f\n", totalMarks);  // <--- Changed.

		printf("Average mark = %.2f\n\n", average);  // <--- Changed.
		//printf("Average mark = %.2f\n\n", totalMarks / MAXSTUDENTS);

		if (totalMarks > highTotalMark)
		{
			highTotalMark = totalMarks;
			highStudent = student;
		}
	}

	printf("\nTHE HIGHEST TOTAL MARK IS --------> %3.2f\n", highTotalMark);
	printf("THE TOP STUDENT IS STUDENT NO ----> %3d\n\n\n", highStudent + 1);

	system("pause");

	return 0;  // <--- May not be required, but makes a good break point for testing.
}