移位运算「建议收藏」

 1 #include <iostream>
 2 using namespace std;
 3 
 4 #define CYCLE_DATA_KEY(baseCycleId, type, elementId)            (((baseCycleId) << 16) | ((type) << 14) | ((elementId) << 8))
 5 #define BASE_CYCLE_ID(dataKey)                                  (((dataKey) >> 16) & 0xFFFF)
 6 #define DATA_TYPE(dataKey)                                      (((dataKey) >> 14) & 0x3)
 7 #define ELEMENT_ID(dataKey)                                     (((dataKey) >> 8) & 0x3F)
 8 
 9 void main()
10 {
11     int nConfig = CYCLE_DATA_KEY(2, 2, 2);
12     cout << "nConfig :: " << nConfig << endl;
13     cout << "BASE_CYCLE_ID :: " << BASE_CYCLE_ID(nConfig) << endl;
14     cout << "DATA_TYPE :: " << DATA_TYPE(nConfig) << endl;
15     cout << "ELEMENT_ID :: " << ELEMENT_ID(nConfig) << endl;
16     system("pause");
17 }
18 
19 // run out:
20 /*
21 nConfig :: 164352
22 BASE_CYCLE_ID :: 2
23 DATA_TYPE :: 2
24 ELEMENT_ID :: 2
25 请按任意键继续. . .
26 */

 1 #include <iostream>
 2 using namespace std;
 3 
 4 void main()
 5 {
 6     cout << "value1 :: " << (1 << 2 + 3 << 4) << endl;
 7     cout << "value2 :: " << (1 << 2) + (3 << 4) << endl;
 8     system("pause");
 9 }
10 
11 // run out:
12 /*
13 value1 :: 512
14 value2 :: 52
15 请按任意键继续. . .
16 */