这是一个创建于 4214 天前的主题，其中的信息可能已经有所发展或是发生改变。
新人，最近刚学的Arduino，之前看过谭浩强的C语言（手动斜眼）
今天想联系一下，然后就编了一个程序，结果.......
程序是
const int LED 9
int i = 0;
void setup()
{
pinMode(LED, OUTPUT);
}
void loop()
{
for(i=0; i<255; i++)
{
analogWrte(LED, i);
delay(10);
}
for(i = 255; i > 0; i--)
{
analogWrite(LED, i);
delay(10);
}
}
报错是
sketch_jun04a:1: error: expected initializer before numeric constant
sketch_jun04a.ino: In function 'void setup()':
sketch_jun04a:6: error: 'LED' was not declared in this scope
sketch_jun04a.ino: In function 'void loop()':
sketch_jun04a:11: error: 'i' was not declared in this scope
sketch_jun04a:13: error: 'LED' was not declared in this scope
sketch_jun04a:19: error: 'LED' was not declared in this scope
今天想联系一下，然后就编了一个程序，结果.......
程序是
const int LED 9
int i = 0;
void setup()
{
pinMode(LED, OUTPUT);
}
void loop()
{
for(i=0; i<255; i++)
{
analogWrte(LED, i);
delay(10);
}
for(i = 255; i > 0; i--)
{
analogWrite(LED, i);
delay(10);
}
}
报错是
sketch_jun04a:1: error: expected initializer before numeric constant
sketch_jun04a.ino: In function 'void setup()':
sketch_jun04a:6: error: 'LED' was not declared in this scope
sketch_jun04a.ino: In function 'void loop()':
sketch_jun04a:11: error: 'i' was not declared in this scope
sketch_jun04a:13: error: 'LED' was not declared in this scope
sketch_jun04a:19: error: 'LED' was not declared in this scope
 | 1 node 2014-06-05 02:14:52 +08:00  1 const int LED 9 后面没加分号，先把这个改了再说，C语言编译出错信息只要看第一条就行，改完第一条的错误之后再编译，再出错的话再查新的第一条 另外i只在loop()里用到，没必要放在全局变量的位置 |
 | 2 nybux 2014-06-05 08:38:12 +08:00 1 const int LED = 9; |
 | 3 IanPeverell OP @node Arduino编译用的是Processing啊 |
| 4 IanPeverell OP |
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