看了汇编看了汇编确实是多了一些语句,但是我想问是为什么??126: volatile unsigned char i,dot_id=0;+00000551: 2422 clr r2 clear register+00000552: 822e std y+6,r2 store indirect with displacement145: unsigned char i,dot_id=0;+00000551: 2400 clr r0 clear register+00000552: 01fe movw r30,r28 copy register pair+00000553: 5be3 subi r30,0xb3 subtract immediate+00000554: 4fff sbci r31,0xff