c++文件读写

最新推荐文章于 2025-06-05 13:15:11 发布

格木风

最新推荐文章于 2025-06-05 13:15:11 发布

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分类专栏： c++编程

本文链接：https://blog.youkuaiyun.com/weixin_39330983/article/details/106101378

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本文详细介绍使用C++进行文件操作的方法，包括文件的写入、读取以及内存拷贝等核心过程。通过实例展示了如何利用fopen、fprintf、fclose进行文件的打开、写入与关闭，以及如何运用memcpy进行数据的拷贝。此外，还介绍了如何读取图片像素并存储到vector中，最后通过fwrite将数据写回文件。

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fopen

FILE *pf = fopen(fn_license.c_str(),"w");
fprintf(pf, "%s\n", msg.c_str());
fclose(pf);

vector<double> orientation = { 1,0,0,0,1,0,0,0,1 };
memcpy(&cbct_volume->get_orientation()[0], orientation.data(), sizeof(double) * 9);
//orientation的内容拷贝到cbct_volume中


//读取图片像素
FILE *pf = fopen(cbct_file.c_str(), "rb");
PTR<vector<short>> tmp_volume_data(new vector<short>(size[0] * size[1] * size[2], 0));
fread(tmp_volume_data->data(), sizeof(short), size[0] * size[1] * size[2], pf);
cbct_volume->set_pixel(tmp_volume_data);
fclose(pf);


std::string ct_path = patient_dir + "\\ct\\" + ct_id + ".bin";
FILE *pf = fopen(ct_path.c_str(), "rb");
if (pf == NULL)
{
    LOGE(_("Load CT is failed!"))
    return false;
}
auto&& tmp_volume_data = vol->get_pixel();
if (!tmp_volume_data)
    tmp_volume_data = PTR_NEW(std::vector<short>);
tmp_volume_data->assign(size[0] * size[1] * size[2],0);
fread(tmp_volume_data->data(), sizeof(short), size[0] * size[1] * size[2], pf);
fclose(pf);

    PTR<std::vector<short>> vol_data;    
    std::string file_path = save_path + "\\" + file_name + ".bin";
    FILE* pf = fopen(file_path.c_str(), "wb");
    fwrite(vol_data->data(), sizeof(short), vol_data->size(), pf);
    fclose(pf);


    std::vector<short> data;
    std::string file_path = save_path + "\\" + file_name + ".raw";
    FILE* pf = fopen(file_path.c_str(), "wb");
    fwrite(&data[0], sizeof(short), data.size(), pf);
    fclose(pf);

参考网址;https://blog.youkuaiyun.com/qq_34097715/article/details/79970860

https://www.cnblogs.com/zhengfa-af/p/8145443.html

https://blog.youkuaiyun.com/weixin_30800807/article/details/97188984