c - c 中的二维数组，检查值时出现意外值

Question

这不是整个程序，只是(据我所知)导致问题的片段，如果需要更多，我会更新

我需要获取一个由 0 组成的矩形数组来模拟网格

int Length, Height, NumberOfParticles, Direction, validInput, StartXPosition, StartYPosition;
int *LatticeHeight;
int **Lattice;

LatticeHeight = (int*)malloc(Height*sizeof(int));

/* 
    Check for memory allocation failure 
*/

if(LatticeHeight==NULL)
{
    printf("\nMemory allocation failure. Exiting ...\n");
    return(EXIT_FAILURE);
}

Lattice = (int**)malloc(Length*sizeof(LatticeHeight));

/* 
    Check for memory allocation failure again 
*/

if(Lattice==NULL)
{
    printf("\nMemory allocation failure. Exiting ...\n");
    return(EXIT_FAILURE);
}

然后有一些我省略的输入验证，但最终它得到了高度和长度的值

int i,j;
for(i=1; i<Height; i++)
{
    LatticeHeight[i] = 0;
}

for(j=0; j<Length; j++)
{
    Lattice[j] = LatticeHeight;
}

for(i=0;i<Height;i++)
{
    for(j=0;j<Length;j++)
    {
        printf("%d\n",Lattice[i][j]);
    }
}

此打印语句返回

139064
0
0
0
139064
0
0
0
139064
0
0
0
139064
0
0
0

谁能解释一下为什么吗？

Answer 1

您已从 1 开始循环

for(i=1; i<Height; i++)
{
    LatticeHeight[i] = 0;
}

改成这样

for(i=0; i<Height; i++)
{
    LatticeHeight[i] = 0;
}