将整数转化为一个任意进制的字符串,将任意进制的字符串转化为一个整数的代码

// 将整数转化为一个任意进制的字符串
static void int_to_string(int value, char* szDest, int type = 10)
{
bool negative = false;
if (value < 0)
{
negative = true;
value = -value;
}

int index = 0;
int nDecNum;
char szTmp[128];
memset(szTmp, 0, 128);
while (value && index < 128)
{
nDecNum = value % type;
value /= type;
if (nDecNum < 10)
{
szTmp[index] = '0' + nDecNum;
}
else
{
szTmp[index] = 'A' + nDecNum - 10;
}
index++;
}

int pos = 0;
if (negative)
{
szDest[pos] = '-';
pos++;
}
for (int i = index - 1; i >= 0; i--)
{
szDest[pos] = szTmp[i];
pos++;
}
szDest[pos] = 0;
}

static int GetNum(char c)
{
if (c >= '0' && c <= '9')
{
return c - '0';
}
else if (c >= 'a' && c <= 'z')
{
return c + 10 - 'a';
}
else if (c >= 'A' && c <= 'Z')
{
return c + 10 - 'A';
}
else
{
return -1;
}
}

// 将任意进制的字符串转化为一个整数
static bool string_to_int(const char* szSrc, int& value, int type = 10)
{
value = 0;
int nDecNum;
int len = (int)strlen(szSrc);
int n = 1;
for(int i = len - 1; i >= 0; i--)
{
nDecNum = GetNum(szSrc[i]);
if (nDecNum == -1)
{
return false;
}
value += nDecNum * n;
n *= type;
}

return true;
}