convert-int-to-short-in-c

int 转换为 short：


uint32_t sum=0xFFFF1234;
uint16_t *p= (uint16_t *) ∑
uint16_t checksum=p[0]; 

check-sum is 0x1234.

Here is another way:

union ToShort
{
        uint32_t sum;
        uint16_t checksum[2];
} toShort;
toShort.sum=0xFFFF1234;
cout << hex << toShort.checksum[0]; 

output is 1234.