printf格式

Question

我想使用printf以0x###的形式显示十六进制数字，但是如果数字为0，我想省略0x部分。

Answer 1

printf("%#x", number);

Note that this does exactly what you want. If the value of number is 0, it prints 0, otherwise it prints in hex. Example:

int x = 0;
int y = 548548;

printf("%#x %#x\n", x, y);

Results in:

0 0x85ec4

Answer 2

 printf ((x == 0) ? "%03x" : "0x%03x", x);

Answer 3

if (num == 0)
{
     printf("0");
}
else
{
     printf("%X", num);
}

Answer 4

Why make it hard?

if number = 0
  printf without formatting
else
  printf with formatting

Answer 5

您不能只使用if语句来检查数字是否为0，然后弄清楚是否应该将其打印为0x ###或仅打印000（或者如果要查找则打印为0）