C - 将指针分配给数组基于四个例子

使用C语言将指针分配给数组的方法

c
#include 
int main() {
    int arr[5] = {1, 2, 3, 4, 5};
    int *ptr = arr;
    printf("Array elements: ");
    for (int i = 0; i < 5; i++) {
        printf("%d ", *(ptr + i));
    }
    return 0;
}

c
#include 
#include 
int main() {
    int *arr;
    arr = (int *)malloc(5 * sizeof(int));
    for (int i = 0; i < 5; i++) {
        arr[i] = i + 1;
    }
    printf("Array elements: ");
    for (int i = 0; i < 5; i++) {
        printf("%d ", arr[i]);
    }
    free(arr);  // 释放动态分配的内存
    return 0;
}

c
#include 
int main() {
    int arr[3][3] = {{1, 2, 3}, {4, 5, 6}, {7, 8, 9}};
    int (*ptr)[3] = arr;
    printf("Array elements: ");
    for (int i = 0; i < 3; i++) {
        for (int j = 0; j < 3; j++) {
            printf("%d ", *(*(ptr + i) + j));
        }
    }
    return 0;
}

c
#include 
int main() {
    int a = 1, b = 2, c = 3;
    int *arr[3] = {&a, &b, &c};
    printf("Array elements: ");
    for (int i = 0; i < 3; i++) {
        printf("%d ", *(arr[i]));
    }
    return 0;
}