How to input two-dimensional array in c++

Enter a two-dimensional array in C by following these steps: define the array (specify the number of rows and columns); use a nested loop to iterate over the array elements, and use the cin stream to read user input.

How to input a two-dimensional array in C

In C, you can input a two-dimensional array through the following steps:

1. Define the array

<code class="cpp">int arr[行数][列数];</code>

• Number of rows Specify the number of rows in the array, Number of columns Specify the array number of columns.

2. Use nested loops to input array elements

<code class="cpp">for (int i = 0; i < 行数; i++) {
    for (int j = 0; j < 列数; j++) {
        cin >> arr[i][j];
    }
}</code>

• This code uses nested loops to iterate through each element in the array, and Use the cin stream to read user input.

Example:

Input a 3x4 two-dimensional array:

<code class="cpp">int main() {
    int arr[3][4];

    for (int i = 0; i < 3; i++) {
        for (int j = 0; j < 4; j++) {
            cin >> arr[i][j];
        }
    }

    return 0;
}</code>

Notes:

• Make sure memory is allocated correctly for the array.
• The traversal order of nested loops is to traverse rows first and then traverse columns.
• You can add appropriate prompts in nested loops to guide the user to enter array elements.

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