postgresql 除法保留小数位的案例
我就废话不多说了，大家还是直接看代码吧~ \x select 8/(100-3) as c1, round(8/(100-3) ,4) as c2, round(8/(100-3)::numeric ,4) as c3, 8/(100-3)::numeric as c4 ; -[ RECORD 1 ]————– c1 | 0 c2 | 0.0000 c3 | 0.0825 c4 | 0.0824742268041237
C语言的深度刨析
测试代码 废话不多说，直接写个测试代码 #includestdio.h //简化的结构体 structiphdr{ unsigned char fin:1; unsigned char rsv:3; unsigned char opcode:4; unsigned char mask:1; unsigned char payload:7; unsigned char a; unsigned char b; }; main()