请编写C语言代码实现

好的，下面是我给出的一份C语言代码实现，供你参考：

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>

#pragma pack(push, 1) // 结构体按照 1 字节对齐
typedef struct
{
    uint8_t blue;
    uint8_t green;
    uint8_t red;
} Pixel;
#pragma pack(pop)

int main(int argc, char *argv[])
{
    if (argc != 6)
    {
        printf("Usage: %s source1.bmp alpha source2.bmp result.bmp\n", argv[0]);
        return 1;
    }

    // 读取第一幅图像
    FILE *fp1 = fopen(argv[1], "rb");
    if (fp1 == NULL)
    {
        printf("Error opening file: %s\n", argv[1]);
        return 1;
    }

    // 读取 BMP 文件头和信息头
    uint8_t bmp_header1[54];
    fread(bmp_header1, 1, 54, fp1);

    // 解析 BMP 文件头和信息头
    uint32_t width1 = *(uint32_t *)(bmp_header1 + 18);
    uint32_t height1 = *(uint32_t *)(bmp_header1 + 22);
    uint16_t bit_count1 = *(uint16_t *)(bmp_header1 + 28);
    uint32_t image_size1 = *(uint32_t *)(bmp_header1 + 34);

    // 读取像素数据
    Pixel *pixels1 = (Pixel *)malloc(image_size1);
    fread(pixels1, 1, image_size1, fp1);

    fclose(fp1);

    // 读取第二幅图像
    FILE *fp2 = fopen(argv[3], "rb");
    if (fp2 == NULL)
    {
        printf("Error opening file: %s\n", argv[3]);
        return 1;
    }

    // 读取 BMP 文件头和信息头
    uint8_t bmp_header2[54];
    fread(bmp_header2, 1, 54, fp2);

    // 解析 BMP 文件头和信息头
    uint32_t width2 = *(uint32_t *)(bmp_header2 + 18);
    uint32_t height2 = *(uint32_t *)(bmp_header2 + 22);
    uint16_t bit_count2 = *(uint16_t *)(bmp_header2 + 28);
    uint32_t image_size2 = *(uint32_t *)(bmp_header2 + 34);

    // 读取像素数据
    Pixel *pixels2 = (Pixel *)malloc(image_size2);
    fread(pixels2, 1, image_size2, fp2);

    fclose(fp2);

    // 计算混合后的像素值
    uint32_t image_size = image_size1;
    if (image_size2 < image_size1)
    {
        image_size = image_size2;
    }

    float alpha = atof(argv[2]) / 100.0f;
    Pixel *result_pixels = (Pixel *)malloc(image_size);

    for (uint32_t i = 0; i < image_size / sizeof(Pixel); i++)
    {
        uint8_t red1 = pixels1[i].red;
        uint8_t green1 = pixels1[i].green;
        uint8_t blue1 = pixels1[i].blue;

        uint8_t red2 = pixels2[i].red;
        uint8_t green2 = pixels2[i].green;
        uint8_t blue2 = pixels2[i].blue;

        uint8_t red = red1 * alpha + red2 * (1 - alpha);
        uint8_t green = green1 * alpha + green2 * (1 - alpha);
        uint8_t blue = blue1 * alpha + blue2 * (1 - alpha);

        result_pixels[i].red = red;
        result_pixels[i].green = green;
        result_pixels[i].blue = blue;
    }

    // 写入新的图像文件
    FILE *fp3 = fopen(argv[4], "wb");
    if (fp3 == NULL)
    {
        printf("Error opening file: %s\n", argv[4]);
        return 1;
    }

    fwrite(bmp_header1, 1, 54, fp3);
    fwrite(result_pixels, 1, image_size, fp3);

    fclose(fp3);

    // 释放内存
    free(pixels1);
    free(pixels2);
    free(result_pixels);

    return 0;
}

注意，这份代码假定输入的两幅图像具有相同的宽度和高度，并且它们的像素数据按照相同的顺序存储在文件中。如果你需要处理其他类型的图像文件，可能需要对代码进行相应的修改。另外，这份代码没有做太多的错误处理，实际应用时可能需要加入更多的错误检查和容错机制。