找不到库函数问题
# include<reg52.h># include<instrins.h>
# define led P2
void delay(int a)
{
while(a--);
}
void main()
{
int i=0;
led=0xfe;
delay(50000);
while(1)
{
for(i=0;i<7;++i)
{
led=_crol_(led,1);
delay(50000);
}
for(i=0;i<7;++i)
{
led=_cror_(led,1);
delay(50000);
}
}
}
大家帮我看一下这个为什么运行会出现: warning C318: can't open file 'instrins.h'
