Question

draw the flowchart to explain c program with a 2D integer array

Answer 1

To explain a C program that works with a 2D integer array using a flowchart, let's break down the basic operations:

Example Program:

Let's consider a simple C program where we:

1. Declare a 2D integer array.
2. Initialize the array with values.
3. Print the array elements.

The general flow for this program would look like this:

1. Start
2. Declare a 2D Array
3. Initialize the 2D Array with Values
4. Loop through the rows
5. Loop through the columns within each row
6. Print the element at the current row and column
7. End

Step-by-Step Explanation:

1. Start: The program begins.
2. Declare a 2D Integer Array: Declare a 2D array such as int arr[3][3]; for a 3x3 matrix.
3. Initialize the Array: Fill the array with integer values. This could be done statically, such as int arr[3][3] = {{1, 2, 3}, {4, 5, 6}, {7, 8, 9}};.
4. Outer Loop (Row Loop): The outer loop iterates through the rows of the array.
5. Inner Loop (Column Loop): The inner loop iterates through the columns of the current row.
6. Print Element: Print the element at position [i][j] in the array, where i is the current row, and j is the current column.
7. End Inner Loop: Finish iterating through the columns for the current row.
8. End Outer Loop: Finish iterating through all rows.
9. End: The program ends.

Example Code:

Here's the C code that follows this flow:

#include <stdio.h>

int main() {
    // Declare and initialize a 2D array
    int arr[3][3] = {{1, 2, 3}, {4, 5, 6}, {7, 8, 9}};

    // Outer loop for rows
    for (int i = 0; i < 3; i++) {
        // Inner loop for columns
        for (int j = 0; j < 3; j++) {
            // Print the current element at arr[i][j]
            printf("%d ", arr[i][j]);
        }
        // Print a new line after each row
        printf("\n");
    }

    return 0;
}