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C18關於for迴圈的使用
#1
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大家好,下面是我用for迴圈想做一個簡單的測試,但是程式並不會執行到

PORTB = 0xff;
PORTB = 0x00;

這兩行就跳出了,我實在想不出原因,想請大家指點一下。

#include<p18f65j50.h>

void main(void)
{
//變數宣告.
int i;

// 初始化I/O.
PORTB = 0x00;
LATB = 0x00;
TRISB = 0x00; // RB[7:0]=I/P.

//用for迴圈做8次.
for(i=0 ; i<8 ; i++)
{
PORTB = 0xff;
PORTB = 0x00;
}

//做完讓程式停在這裡.
while(1){}
}

另一個發現:

如果把回圈條件改成

for(i=0 ; i<100 ; i++)

居然就可以了,請問這是怎麼回事?

發表於: 2009/12/14 15:17

Edited by wei0510 on 2009年12月14日 15:34:25
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