二进制对照表

2^0 1 1
2^1 2 10
2^2 4 100
2^3 8 1000
2^4 16 10000
2^5 32 100000
2^6 64 1000000
2^7 128 10000000
2^8 256 100000000
2^9 512 1000000000
2^10 1024 100000000000
2^11 2048 1000000000000
2^12 4096 10000000000000