动态创建数组，一维和二维

#include<stdio.h>
#include<stdlib.h>
void OneDimensionVector(){                      //用来创建一维数组
    int n, i;
    int *arr;
    scanf("%d",&n);
    arr = (int*)malloc(sizeof(int)*n);
    for (i = 0; i < n; i++)
        arr[i] = i;
    for (i = 0; i < n; i++)
        printf("%d",arr[i]);
}

二维：

void TwoDimensionVector(){               //二维
    int m,n,i,j,k=0;
    int** arr;
    scanf("%d%d",&m,&n);
    arr = (int**)malloc(sizeof(int*)*m);//创建一个指针数组，把指针数组的地址赋值给a
    for (i = 0; i < m; i++)
        arr[i] = (int*)malloc(sizeof(int)*n);//给第二维分配空间

    for (i = 0; i < m; i++){
        for ( j = 0; j < n; j++)
            arr[i][j] = k++;
    }

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