c++ - 无法在赋值中将 ‘libraryname::ZlibCompressor’ 转换为 ‘libraryname::Compressor*’(到数组索引)

Question

main.cc: In function ‘int main()’:
main.cc:10:26: error: cannot convert ‘libraryname::ZlibCompressor’ to ‘libraryname::Compressor*’ in assignment
   options.compressors[0] = libraryname::ZlibCompressor();

options 是一个结构体，compressors 定义为:

Compressor* compressors[256];

ZlibCompressor 是 Compressor 的子类。

知道为什么会出现这个错误吗？谢谢!

Answer 1

options.compressors[0] = libraryname::ZlibCompressor();

options.compressors[0] 的类型是Compressor *，也就是指针。你应该给个指点。

libraryname::ZlibCompressor zc;
options.compressors[0] = &zc;