02x与%2x 之间的区别 - CSDN博客
例子:
#include <stdio.h>
int main() { int i = -20; for(i = -20; i < 21; i++) { printf("%2x\n", i); printf("%02x\n", i); } return 0; }输出结果:
ffffffec ffffffec
ffffffed ffffffed
ffffffee ffffffee
ffffffef ffffffef
fffffff0 fffffff0
fffffff1 fffffff1
fffffff2 fffffff2
fffffff3 fffffff3
fffffff4 fffffff4
fffffff5 fffffff5
fffffff6 fffffff6
fffffff7 fffffff7
fffffff8 fffffff8
fffffff9 fffffff9
fffffffa fffffffa
fffffffb fffffffb
fffffffc fffffffc
fffffffd fffffffd
fffffffe fffffffe
ffffffff ffffffff
0 00
1 01
2 02
3 03
4 04
5 05
6 06
7 07
8 08
9 09
a 0a
b 0b
c 0c
d 0d
e 0e
f 0f
10 10
11 11
12 12
13 13
14 14
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