{
int i = 0;
int tmp = 0;
char *buffer = (char *)malloc(11);
char *temp;
buffer[0] = '0', buffer[1] = 'x', buffer[10] = '\0';
temp = buffer + 2;
for (i = 0; i < 8; i++)
{
tmp = num & 0x0000000f;
printf("tmp=%d num=%d, num & 0x0000000f=%d\n", tmp, num, num & 0x0000000f);
temp[7 - i] = (tmp < 10) ? ('0' + tmp) : ('A' + tmp - 10);
printf("temp[9 - i]=%d\n", temp[9 - i]);
num = num >> 4;
}
printf("buffer=%s\n", buffer );
if(buffer != NULL)
{
free(buffer);
}
}
位操作，实现取10的余数
而下面则是去16余数，然后反序
{
char str[32] = "";
long x1 = 0xabc;
long x2 = 0;
int x3 = 0;
char c1;
x2 = x1 / 0x10;
int i = 0;
printf("x1 = %d x2 = %d\n", x1, x2);
while(x2 > 0)
{
x1 = x1 % 0x10;
printf("< x1 = %d x2 = %d x3 = %d", x1, x2, x3);
if(x1 < 10)
x1 = x1;
else
{
x1 = 'A' + x1 - 10;
}
str[i++] = x1;
x1 = x2;
x2 = x1 / 0x10;
}
if(x1 <= 10)
str[i++] = 'A' + x1 - 10;
printf("11 str=%s\n", str );
for(int j = i - 1; j >= i / 2; j --)
{
c1 = str[j];
str[j] = str[i - j - 1];
str[i - j - 1] = c1;
}
__asm(" MOVN A,#1");
printf("22 str=%s\n", str );
}