const static 统一定义buffer大小

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#include <iostream> #include <string> using namespace std;   #include <stdint.h> #include <stdio.h> #include <stdlib.h>   typedef uint32_t u32; typedef uint8_t u8; typedef uint16_t u16;     const static int BUF_LEN_1 = 1; const static int BUF_LEN_8 = 8; const static int BUF_LEN_20 = 20; const static int BUF_LEN_33 = 33; const static int BUF_LEN_64 = 64; const static int BUF_LEN_128 = 128; const static int BUF_LEN_256 = 256; const static int BUF_LEN_512 = 512; const static int BUF_LEN_1024 = 1024; const static int BUF_LEN_4096 = 4096;   int main() {   cout << "hello,world" << endl;   cout << "ni hao " <<endl;   char buf[BUF_LEN_128];     cout << sizeof(buf)<<endl;   return 0; }