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3D Array

A multidimensional array in C is essentially an array of arrays. The most common type is a 2D array, but you can have more dimensions, like 3D arrays or even higher.

Example:

Let’s say we are storing temperature data for a city over multiple weeks, where:

The first dimension represents the week.
The second dimension represents the day of the week.
The third dimension stores the temperature readings (morning, afternoon, evening).

#include <stdio.h>

int main() {
    // 3 weeks, 7 days per week, 3 temperature readings per day
    int temperature[3][7][3] = {
        { {30, 32, 28}, {31, 33, 29}, {32, 34, 30}, {33, 35, 31},
         {34, 36, 32}, {35, 37, 33}, {36, 38, 34} }, //week 1
         { {28, 30, 26},{29, 31, 27}, {30, 32, 28}, {31, 33, 29}, 
         {32, 34, 30}, {33, 35, 31}, {34, 36, 32} },  //week 2
        { {27, 29, 25}, {28, 30, 26}, {29, 31, 27}, {30, 32, 28}, 
        {31, 33, 29}, {32, 34, 30}, {33, 35, 31} }  //week 3
    };

    // Display temperature readings for Week 1, Day 1
    printf("Temperature readings for Week 1, Day 1:\n");
    printf("Morning: %d°C, Afternoon: %d°C, Evening: %d°C\n",
           temperature[0][0][0], temperature[0][0][1], temperature[0][0][2]);

    return 0;
}

Output:

Temperature readings for Week 1, Day 1:
Morning: 30°C, Afternoon: 32°C, Evening: 28°C

Explanation:

We define a 3D array with dimensions [3][7][3]:
3 weeks
7 days per week
3 temperature readings per day (Morning, Afternoon, Evening)

Week 1:

Day Temp 1 Temp 2 Temp 3
Monday 30 32 28
Tuesday 31 33 29
Wednesday 32 34 30
Thursday 33 35 31
Friday 34 36 32
Saturday 35 37 33
Sunday 36 38 34

Week 2:

Day Temp 1 Temp 2 Temp 3
Monday 28 30 26
Tuesday 29 31 27
Wednesday 30 32 28
Thursday 31 33 29
Friday 32 34 30
Saturday 33 35 31
Sunday 34 36 32

Week 3:

Day Temp 1 Temp 2 Temp 3
Monday 27 29 25
Tuesday 28 30 26
Wednesday 29 31 27
Thursday 30 32 28
Friday 31 33 29
Saturday 32 34 30
Sunday 33 35 31