C - 动态数组

#include<stdio.h>
#include <stdlib.h>

int main() {
    int n;
    printf("请输入数组大小：");
    scanf("%d", &n);

    int *arr = (int *)malloc(n * sizeof(int));
    if (arr == NULL) {
        printf("内存分配失败！\n");
        return 1;
    }

    for (int i = 0; i < n; i++) {
        arr[i] = i;
    }

    for (int i = 0; i < n; i++) {
        printf("%d ", arr[i]);
    }
    printf("\n");

    free(arr);
    return 0;
}