Question

unsigned char 数组和char数组怎么互相转换

Answer 1

#include <iostream>
#include <string>
using namespace std;

void convertUnCharToStr(char* str, unsigned char* UnChar, int ucLen)
{
int i = 0;
for(i = 0; i < ucLen; i++)
{
//格式化输str,每unsigned char 转换字符占两位置%x写输%X写输
sprintf(str + i * 2, "%02x", UnChar[i]);
}
}

void convertStrToUnChar(char* str, unsigned char* UnChar)
{
int i = strlen(str), j = 0, counter = 0;
char c[2];
unsigned int bytes[2];

for (j = 0; j < i; j += 2)
{
if(0 == j % 2)
{
c[0] = str[j];
c[1] = str[j + 1];
sscanf(c, "%02x" , &bytes[0]);
UnChar[counter] = bytes[0];
counter++;
}
}
return;
}

int main()
{
unsigned char src[6] = {0x12, 0x32,0x56,0x78,0x90,0xab};
char buffer[20];//维数定义些
convertUnCharToStr(buffer, src, 6);
printf("%s\n", buffer);

unsigned char dst[6];
int len = strlen(buffer);
cout << len << endl;
convertStrToUnChar(buffer, dst);

int i = 0;
for(i = 0; i < 6; i++)
{
printf("%x ", dst[i]);
}
cout << endl;

return 0;
}