大家好，
请问下列这段程式码里:后加上数字代表什么意思呢?
本来以为是宣告初值，
但实际上用DEV C++试着跑一个简单的code发现不是这样，
谢谢大家!
typedef struct ch_properties {
unsigned int amplitudeScale :14;
unsigned int :2;
unsigned int amplitudeOffset :14;
unsigned int :2;
uint32_t counterWrap;
uint32_t startOffset;
uint32_t counterStep;
unsigned int :2;
uint32_t buffReadPointer :14;
unsigned int :16;
uint32_t cyclesInOneBurst;
uint32_t burstRepetitions;
uint32_t delayBetweenBurstRepetitions;
} ch_properties_t;