Zi 字媒體

C/C++ 計算陣列長度/數值轉BYTE陣列/計算BYTE陣列的checksum   #include #include using namespace std; void Pause() {     printf(“Press Enter key to continue…”);     fgetc(stdin); } /*     //int 轉 byte     unsigned char bytes[4];     unsigned long n = 0x5555;     bytes[0] = (n >> 24) & 0xFF;     bytes[1] = (n >> 16) & 0xFF;     bytes[2] = (n >> 8) & 0xFF;     bytes[3] = n & 0xFF;     printf(“X X X X\n”, bytes[0], bytes[1], bytes[2], bytes[3]); */ int main() {     unsigned char arr[] = {0x80,0x15,0x1,0x8,0x30,0x33,0x31,0x35,0x31,0x30,0x33,0x30,0x2,0x8,0x30,0x33,0x35,0x31,0x2d,0x33,0x32,0x31,0x30,0xe};     unsigned int sum =0;     unsigned char checksum[2];     for(int i=0;i     {         sum+=arr[i];     }     checksum[0] = (sum >> 8) & 0xFF;     checksum[1] = sum & 0xFF;     printf(“X X\n”, checksum[0], checksum[1]);     cout<     Pause();     return 0; }