初识字节对齐 (二)
gned f14 : 1;
unsigned f15 : 1;
unsigned f16 : 1;
unsigned f17 : 1;
unsigned f18: 1;
unsigned f19 : 1;
unsigned f20 : 1;
unsigned f21 : 1;
unsigned f22 : 1;
unsigned f23 : 1;
unsigned f24 : 1;
unsigned f25 : 1;
unsigned f26 : 1;
unsigned f27 : 1;
unsigned f28 : 1;
unsigned f29 : 1;
unsigned f30 : 1;
unsigned f31 : 1;
unsigned f32 : 1;
}new_log_t;sizeof(new_log_t) = 4，我明白了，则
[cpp]
typedef struct
{
unsigned f1 : 1;
unsigned f2 : 1;
unsigned f3 : 1;
unsigned f4 : 1;
unsigned f5 : 1;
unsigned f6 : 1;
unsigned f7 : 1;
unsigned f8 : 1;
unsigned f9 : 1;
unsigned f10 : 1;
unsigned f11 : 1;
unsigned f12 : 1;
unsigned f13 : 1;
unsigned f14 : 1;
unsigned f15 : 1;
unsigned f16 : 1;
unsigned f17 : 1;
unsigned f18: 1;
unsigned f19 : 1;
unsigned f20 : 1;
unsigned f21 : 1;
unsigned f22 : 1;
unsigned f23 : 1;
unsigned f24 : 1;
unsigned f25 : 1;
unsigned f26 : 1;
unsigned f27 : 1;
unsigned f28 : 1;
unsigned f29 : 1;
unsigned f30 : 1;
unsigned f31 : 1;
unsigned f32 : 1;
unsigned f33 : 1;
unsigned f34 : 1;
unsigned f35 : 1;
unsigned f36 : 1;
unsigned f37 : 1;
unsigned f38 : 1;
unsigned f39 : 1;
unsigned f40 : 1;
unsigned f41 : 1;
unsigned f42 : 1;
unsigned f43 : 1;
unsigned f44 : 1;
unsigned f45 : 1;
unsigned f46 : 1;
unsigned f47 : 1;
unsigned f48 : 1;
unsigned f49: 1;
unsigned f50 : 1;
unsigned f51 : 1;
unsigned f52 : 1;
unsigned f53 : 1;
unsigned f54 : 1;
unsigned f55 : 1;
unsigned f56 : 1;
unsigned f57 : 1;
unsigned f58 : 1;
unsigned f59 : 1;
unsigned f60 : 1;
unsigned f61 : 1;
unsigned f62 : 1;
unsigned f63 : 1;
unsigned f64 : 1;
}new_log_t;
typedef struct
{
unsigned f1 : 1;
unsigned f2 : 1;
unsigned f3 : 1;
unsigned f4 : 1;
unsigned f5 : 1;
unsigned f6 : 1;
unsigned f7 : 1;
unsigned f8 : 1;
unsigned f9 : 1;
unsigned f10 : 1;
unsigned f11 : 1;
unsigned f12 : 1;
unsigned f13 : 1;
unsigned f14 : 1;
unsigned f15 : 1;
unsigned f16 : 1;
unsigned f17 : 1;
unsigned f18: 1;
unsigned f19 : 1;
unsigned f20 : 1;
unsigned f21 : 1;
unsigned f22 : 1;
unsigned f23 : 1;
unsigned f24 : 1;
unsigned f25 : 1;
unsigned f26 : 1;
unsigned f27 : 1;
unsigned f28 : 1;
unsigned f29 : 1;
unsigned f30 : 1;
unsigned f31 : 1;
unsigned f32 : 1;
unsigned f33 : 1;
unsigned f34 : 1;
unsigned f35 : 1;
unsigned f36 : 1;
unsigned f37 : 1;
unsigned f38 : 1;
unsigned f39 : 1;
unsigned f40 : 1;
unsigned f41 : 1;
unsigned f42 : 1;
unsigned f43 : 1;
unsigned f44 : 1;
unsigned f45 : 1;
unsigned f46 : 1;
unsigned f47 : 1;
unsigned f48 : 1;
unsigned f49: 1;
unsigned f50 : 1;
unsigned f51 : 1;
unsigned f52 : 1;
unsigned f53 : 1;
unsigned f54 : 1;
unsigned f55 : 1;
unsigned f56 : 1;
unsigned f57 : 1;
unsigned f58 : 1;
unsigned f59 : 1;
unsigned f60 : 1;
unsigned f61 : 1;
unsigned f62 : 1;
unsigned f63 : 1;
unsigned f64 : 1;
}new_log_t;我猜sizeof后是8个字节，sizeof后果然是 8