c - c中的分配存储和二进制fwrite短裤

Question

我正在尝试分配单个短裤 block ，将其写入文件， 然后再读回来。但是写入的数据 文件与输出的内容不匹配。我已经隔离了问题 到以下代码。知道我做错了什么吗？

#define CHUNK_SIZE 1000
void xwriteStructuresToFile(FILE *file, void * structureData)
{
    assert((fwrite(structureData, sizeof(short), CHUNK_SIZE, file)) == CHUNK_SIZE);

}

void wwbuildPtxFiles(void)
{   
    FILE *file = fopen("s:\\tv\\run32\\junky.bin", WRITE_BINARY);
    int count = 10;
    short *ptx = (short *) calloc(CHUNK_SIZE * count, sizeof(short ) );

    memset(ptx, '3', sizeof(short) * CHUNK_SIZE * count);
    for (int dayIndex = 0; dayIndex < count; ++dayIndex)
        xwriteStructuresToFile(file, (void *) &ptx[ CHUNK_SIZE * sizeof(short) * dayIndex ]);

    free(ptx);
    fclose(file);

    file = fopen("s:\\tv\\run32\\junky.bin", READ_BINARY);
    int xcount = CHUNK_SIZE * count * sizeof(short );
    for (int i = 0; i < xcount; ++i)
    {
        char x;
        if ((x = getc(file)) != '3')
            assert(false);
    }
}

Answer 1

从数组索引中删除 sizeof(short)。 C会为你做这个计算