C exercise;The time worked form

I have a trouble with my home work in computer courses. Here the exercise;
The time worked form is a cube whose axes are: year, month, day of the month.

Fill a three-dimensional array with data from 0 to 10 for 2015 - 2020. Request to enter the calendar number dd.mm.yy and give out the number of hours worked on that day.

Firstly i took numbers, then i gave a answer with the number or work hours,
how I understand i need make a matrix( jne side is days, another side is months and third side is year, but i dont know how to do it
firstly i try to train with 2 dimension array,

when i used such formula

Code:

---

for (i = 0; i < Months; i++)
    {
        for (j = 0; j < Days; j++)
 Cal[i][j] = i,j;
}

for (i = 0; i < Months; i++)
    {
        for (j = 0; j < Days; j++)
printf("%i", Cal[i][j]);

---

the matrix was like this
0000
1111
2222
3333

but dont like
0123
1
2
how i expect.

i think its must be one side is months, one side is days, inside of it is hours, and somewhere is years;

here the code what i write, its not complete exercise, need some help with solving and explaining. If you give me a links on a good books and videos for c, its will be good too,

Code:

---

//


#include <iostream>
#include <stdio.h>
#include <windows.h>
#include <conio.h>
#include "time.h"
#define Years 6
#define Months 12
#define Days 31






int main()
{
    srand(time(NULL));
    int y, m, d;
    int  Cal[12][31][1];
    int i, j,k = 0;
    int h = rand() % 10;
   
    //take information
    do {
        printf("Enter the year\n");
        scanf_s("%i", &y);
        if (y < 2015||y>2020)
            printf("Wrong year\n");
    } while (y < 2015 || y>2020);
    do {
        printf("Enter the month\n");
        scanf_s("%i", &m);
        if (m < 1 || m>12)
            printf("Wrong month\n");
    } while (y < 1 || m>12);
    do {
        printf("Enter the day\n");
        scanf_s("%i", &d);
        if (d < 1 || d>31)
            printf("Wrong day\n");
    } while (d < 1 || d>31);
    // give how many work hours in this day person have
    printf("For day %i month %i year %i \n", d, m, y);
    printf("You have %i work hours", h);


 
    for (i = 0; i < Months; i++)
    {
        for (j = 0; j < Days; j++)
        {
            for (k = 0; k < Years; k++)


                k = y;
            Cal[i][j][k];
        }
    }


}

---

Quote:

---

three-dimensional array

---

Code:

---

#include <math.h>
#include <stdio.h>
#include <string.h>

#define maxYear 4196
#define maxMonths 13
#define maxDays 34
//
#define january 1
#define february 2
#define march 3
#define april 4
#define may 5
#define june 6
#define july 7
#define august 8
#define september 9
#define october 10
#define november 11
#define december 12
//
double hoursOn[maxMonths][maxDays][maxYear];

int main(int args, char *argv[]) {

    hoursOn[february][2][2016] = 8.5;
   
    printf("%0.2f\n", hoursOn[january][10][2018] );
    printf("%0.2f\n", hoursOn[february][2][2016] );
   
    return 0;
}

---