What are the array assignment methods in C language?

There are six methods of array assignment in C language: 1. Direct assignment; 2. Use array initializer; 3. Use pointers; 4. Use loops; 5. Use memcpy() function; 6. Use scanf () function.

C language array assignment method

In C language, array is a data structure that is used to A collection that stores data of the same type. Arrays can be assigned in many ways, the specific methods are as follows:

1. Direct assignment:

This is the simplest and most direct assignment method, directly assigning elements Assign the value to the array element:

<code class="c">int arr[5] = {1, 2, 3, 4, 5};</code>

2. Use the array initializer:

The array initializer is a more concise way of assigning values, it can be directly used in the array Specify the element value when defining:

<code class="c">int arr[] = {1, 2, 3, 4, 5};</code>

3. Use pointers:

Use pointers to assign array elements one by one. The syntax is as follows:

<code class="c">int arr[5];
int *ptr = arr;

*ptr = 1; // 赋值第一个元素
*(ptr + 1) = 2; // 赋值第二个元素
...</code>

4. Use loops:

Loops can be used to batch assign array elements, the syntax is as follows:

<code class="c">int arr[5];

for (int i = 0; i < 5; i++) {
  arr[i] = i + 1;
}</code>

5. Use memcpy() function:

The memcpy() function can copy a piece of memory at one time, and can also be used to assign an array:

<code class="c">int arr[5];
int src[5] = {1, 2, 3, 4, 5};

memcpy(arr, src, sizeof(src));</code>

6. Use the scanf() function:

scanf The () function can get data from user input and assign it to array elements. The syntax is as follows:

<code class="c">int arr[5];

scanf("%d %d %d %d %d", &arr[0], &arr[1], &arr[2], &arr[3], &arr[4]);</code>

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