用C语言将位流写入文件

#include <stdio.h>

// 定义一个位流结构体
typedef struct {
    unsigned char data;  // 存储位流的字节
    int bitIndex;        // 当前位的索引
} BitStream;

// 初始化位流
void initBitStream(BitStream* stream) {
    stream->data = 0;
    stream->bitIndex = 0;
}

// 将位写入位流
void writeBit(BitStream* stream, int bit) {
    if (bit) {
        stream->data |= (1 << stream->bitIndex);
    }
    stream->bitIndex++;

    // 当字节已满时，写入文件
    if (stream->bitIndex == 8) {
        FILE* file = fopen("output.bin", "ab");
        fwrite(&(stream->data), sizeof(unsigned char), 1, file);
        fclose(file);

        stream->data = 0;
        stream->bitIndex = 0;
    }
}

// 关闭位流，将剩余的位写入文件
void closeBitStream(BitStream* stream) {
    if (stream->bitIndex > 0) {
        FILE* file = fopen("output.bin", "ab");
        fwrite(&(stream->data), sizeof(unsigned char), 1, file);
        fclose(file);
    }
}

int main() {
    BitStream stream;
    initBitStream(&stream);

    // 示例：将位流 10101010 写入文件
    writeBit(&stream, 1);
    writeBit(&stream, 0);
    writeBit(&stream, 1);
    writeBit(&stream, 0);
    writeBit(&stream, 1);
    writeBit(&stream, 0);
    writeBit(&stream, 1);
    writeBit(&stream, 0);

    closeBitStream(&stream);

    return 0;
}