[問題] int x=3,y=1; y+=x-=y; 的問題
int x=3,y=1;
y+=x-=y;
printf("%d %d\n",x,y);
想問大大們的是...
為什麼最後印出x=2 y=3
我一直以為跑的順序為
step 1. y=y+x; // 跑完這行 x=3 y=4
step 2. x=x-y; // 跑完這行 x=-1 y=4
但後來才發現應該是先跑step2再跑step1 可是不懂為什麼會這樣
真的很謝謝大大
--
※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 123.195.13.64
→
08/10 21:32, , 1F
08/10 21:32, 1F
→
08/10 21:33, , 2F
08/10 21:33, 2F
→
08/10 21:38, , 3F
08/10 21:38, 3F
→
08/10 21:54, , 4F
08/10 21:54, 4F
→
08/10 22:59, , 5F
08/10 22:59, 5F
→
08/10 23:01, , 6F
08/10 23:01, 6F
→
08/11 00:26, , 7F
08/11 00:26, 7F
→
08/11 00:27, , 8F
08/11 00:27, 8F
→
08/11 00:28, , 9F
08/11 00:28, 9F
→
08/11 02:11, , 10F
08/11 02:11, 10F
→
08/11 02:11, , 11F
08/11 02:11, 11F
推
08/11 02:56, , 12F
08/11 02:56, 12F
→
08/11 02:57, , 13F
08/11 02:57, 13F
→
08/11 02:58, , 14F
08/11 02:58, 14F
→
08/11 03:19, , 15F
08/11 03:19, 15F
→
08/11 03:21, , 16F
08/11 03:21, 16F
推
08/11 03:31, , 17F
08/11 03:31, 17F
→
08/11 03:32, , 18F
08/11 03:32, 18F
→
08/11 07:29, , 19F
08/11 07:29, 19F
→
08/11 07:32, , 20F
08/11 07:32, 20F
→
08/11 07:32, , 21F
08/11 07:32, 21F
→
08/11 07:38, , 22F
08/11 07:38, 22F
→
08/11 07:39, , 23F
08/11 07:39, 23F
→
08/11 07:40, , 24F
08/11 07:40, 24F
→
08/11 07:41, , 25F
08/11 07:41, 25F
→
08/11 07:42, , 26F
08/11 07:42, 26F
→
08/11 08:12, , 27F
08/11 08:12, 27F
→
08/11 08:12, , 28F
08/11 08:12, 28F
→
08/11 08:15, , 29F
08/11 08:15, 29F
→
08/11 08:16, , 30F
08/11 08:16, 30F
→
08/11 08:16, , 31F
08/11 08:16, 31F
→
08/11 08:17, , 32F
08/11 08:17, 32F
→
08/11 08:17, , 33F
08/11 08:17, 33F
推
08/11 08:20, , 34F
08/11 08:20, 34F
→
08/11 08:29, , 35F
08/11 08:29, 35F
→
08/11 08:30, , 36F
08/11 08:30, 36F
→
08/11 08:31, , 37F
08/11 08:31, 37F
→
08/11 09:18, , 38F
08/11 09:18, 38F
→
08/11 09:18, , 39F
08/11 09:18, 39F
還有 24 則推文
→
08/11 20:05, , 64F
08/11 20:05, 64F
→
08/11 20:05, , 65F
08/11 20:05, 65F
→
08/11 20:06, , 66F
08/11 20:06, 66F
→
08/11 20:06, , 67F
08/11 20:06, 67F
→
08/11 20:07, , 68F
08/11 20:07, 68F
→
08/11 20:08, , 69F
08/11 20:08, 69F
→
08/11 20:09, , 70F
08/11 20:09, 70F
→
08/11 20:09, , 71F
08/11 20:09, 71F
→
08/11 20:10, , 72F
08/11 20:10, 72F
→
08/11 20:10, , 73F
08/11 20:10, 73F
→
08/11 20:10, , 74F
08/11 20:10, 74F
→
08/11 20:11, , 75F
08/11 20:11, 75F
→
08/11 20:17, , 76F
08/11 20:17, 76F
→
08/11 20:35, , 77F
08/11 20:35, 77F
→
08/11 20:35, , 78F
08/11 20:35, 78F
→
08/11 20:36, , 79F
08/11 20:36, 79F
→
08/11 20:37, , 80F
08/11 20:37, 80F
→
08/11 20:37, , 81F
08/11 20:37, 81F
→
08/12 08:31, , 82F
08/12 08:31, 82F
→
08/12 08:31, , 83F
08/12 08:31, 83F
→
08/12 08:31, , 84F
08/12 08:31, 84F
→
08/12 08:33, , 85F
08/12 08:33, 85F
→
08/12 08:33, , 86F
08/12 08:33, 86F
→
08/12 08:34, , 87F
08/12 08:34, 87F
→
08/12 09:13, , 88F
08/12 09:13, 88F
→
08/12 09:13, , 89F
08/12 09:13, 89F
→
08/12 09:14, , 90F
08/12 09:14, 90F
→
08/12 09:14, , 91F
08/12 09:14, 91F
→
08/12 09:16, , 92F
08/12 09:16, 92F
→
08/12 09:17, , 93F
08/12 09:17, 93F
→
08/12 09:21, , 94F
08/12 09:21, 94F
→
08/12 09:21, , 95F
08/12 09:21, 95F
→
08/12 09:21, , 96F
08/12 09:21, 96F
→
08/12 09:22, , 97F
08/12 09:22, 97F
→
08/12 09:26, , 98F
08/12 09:26, 98F
→
08/12 09:28, , 99F
08/12 09:28, 99F
→
08/12 09:30, , 100F
08/12 09:30, 100F
→
08/12 09:31, , 101F
08/12 09:31, 101F
→
08/12 16:40, , 102F
08/12 16:40, 102F
→
08/12 16:41, , 103F
08/12 16:41, 103F
討論串 (同標題文章)
以下文章回應了本文:
完整討論串 (本文為第 1 之 2 篇):
C_and_CPP 近期熱門文章
PTT數位生活區 即時熱門文章