C语言 字节数组和hex和互相转换
C语言 字节数组和hex和互相转换
#include<iostream> #include<string.h> #include<stdio.h> //字节流转换为十六进制字符串 void ByteToHexStr(const unsigned char* source, char* dest, int sourceLen) { short i; unsigned char highByte, lowByte; for (i = 0; i < sourceLen; i++) { highByte = source[i] >> 4; lowByte = source[i] & 0x0f; highByte += 0x30; if (highByte > 0x39) dest[i * 2] = highByte + 0x07; else dest[i * 2] = highByte; lowByte += 0x30; if (lowByte > 0x39) dest[i * 2 + 1] = lowByte + 0x07; else dest[i * 2 + 1] = lowByte; } return; } //十六进制字符串转换为字节流 void HexStrToByte(const char* source, unsigned char* dest, int sourceLen) { short i; unsigned char highByte, lowByte; for (i = 0; i < sourceLen; i += 2) { highByte = toupper(source[i]); lowByte = toupper(source[i + 1]); if (highByte > 0x39) highByte -= 0x37; else highByte -= 0x30; if (lowByte > 0x39) lowByte -= 0x37; else lowByte -= 0x30; dest[i / 2] = (highByte << 4) | lowByte; } return; } int main() { char array[5] = { 12,45,-12,34,32 }; char out[1024] = { 0 }; char arrayout[1024] = { 0 }; ByteToHexStr((const unsigned char*)array, out, 5); printf("%s\n",out); HexStrToByte((const char*)out, (unsigned char*)arrayout, strlen(out)); printf("{"); for(int i = 0; i<strlen(arrayout);i++) { printf("%d ",arrayout[i]); } printf("}"); }