c - fwrite() 不向文件写入任何内容 - C

Question

我目前正在编写霍夫曼代码来压缩和解压缩文件。我目前正处于将霍夫曼树中每个字符的“路线”转换为 int 并将其写入二进制文件的阶段。这就是我所得到的:

int ConversionToBinary ( FILE *binaryFile, char *string, int *currentBit, int *bitCounter ) {
    int x;
    int stringLength;
    stringLength = CalculateStringLength ( string );
    short int i;
    for ( i = 0; i < stringLength; i++ ) {
        x = ConversionToNumber ( string [ i ] );
        *currentBit = x | 1 << *contadorDeBits;
        *bitCounter++;
        if  ( *bitCounter == MAX_NUMBER_OF_BITS ) {
            fwrite ( currentBit, 1, sizeof ( int ), binaryFile );
            *currentBit = 0;
            *bitCounter = 0;
        }
    }
}

该部分代码基于我在 this thread 中找到的内容:

这是调用 ConversionToBinary 的函数的相关部分，以防万一:

currentBit = bitCounter = 0;
EmptyString ( string );
while ( ( character = fgetc ( textFile ) ) != EOF ) {
    auxElement = SearchInHashTable ( HashTable, character );
    strcpy ( string, auxElement -> route );
    ConversionToBinary ( binaryFile, string, &currentBit, &bitCounter );
    EmptyString ( string );
}

如您所见，我将所有相关数据存储在哈希表中，以便我可以轻松地从那里检索它。

事情是，当我调用ConversionToBinary时，它没有写任何东西，我不知道为什么会这样。我已经检查过条件 *( bitCounter == MAX_NUMBER_OF_BITS ) 是否满足，但逻辑上应该如此，所以即使实际转换是错误的，至少它应该写一些东西 em> 在我的文件中，但事实并非如此。

我目前已经没有想法了，我需要一些帮助。

Answer 1

I was checking why that operation went the way it did. If I'm not getting this wrong, it has to do something with the operator precedence. According to this, the operators * and ++ have the same precedence, and they are evaluated from right to left. So when i was doing this: *bitCounter++, instead of incrementing said value, i was setting its memory address one block further away, so when I asked for value it was showing me the value stored in said address. Was that the error i was committing more or less? – ShadowGeist

这几乎是正确的，除了 *bitCounter++ 产生存储在增量之前的地址的值，即。 e.在第一个循环中的原始 bitCounter 处，在第二个循环中的下一个地址处，依此类推。