怎么转成十进制的数啊？？？

[likehost]

StartCode = "0x1312"
char buffer[6];
memset(buffer,0,6);
memcpy(buffer,StartCode,6);
怎么转成十进制的数啊

[快乐鹦鹉]

StartCode = "0x1312"
char buffer[6];
memset(buffer,0,6);
memcpy(buffer,StartCode,6);
int n = strtol(buffer,NULL,16);

[zottff]

char c;
int value = 0;
for(int i=2; i<6; i++)
{
c= buffer[i];
value = value *16;
if(c >='0' && c <= '9')
value += c -'0';
if(c >='A' && c <= 'Z')
value += c -'A';
if(c >='a' && c <= 'z')
value += c -'a';
}

[快乐鹦鹉]

[Quote=引用 2 楼 zottff 的回复:]
char c;
int value = 0;
for(int i=2; i <6; i++)
{
c= buffer[i];
value = value *16;
if(c >='0' && c <= '9')
value += c -'0';
if(c >='A' && c <= 'Z')
value += c -'A';
if(c >='a' && c <= 'z')
value += c -'a';
}

[/Quote]
吐血，你自己不会就这么干的吧......

[ricki_py]

[Quote=引用 2 楼 zottff 的回复:]
char c;
int value = 0;
for(int i=2; i<6; i++)
{
c= buffer[i];
value = value *16;
if(c >='0' && c <= '9')
value += c -'0';
if(c >='A' && c <= 'Z')
value += c -'A';
if(c >='a' ……
[/Quote]
你是怎么用的啊？