使用fwrite将文件保存到新目录

FILE *sourceFile = fopen("path/to/source/file", "rb");
mkdir("path/to/destination/folder");

char destinationPath[256];
sprintf(destinationPath, "path/to/destination/folder/%s", "filename.ext");

FILE *destinationFile = fopen(destinationPath, "wb");
if (sourceFile && destinationFile) {
    char buffer[1024];
    size_t bytesRead;
    while ((bytesRead = fread(buffer, 1, sizeof(buffer), sourceFile)) > 0) {
        fwrite(buffer, 1, bytesRead, destinationFile);
    }
}

fclose(sourceFile);
fclose(destinationFile);