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led lighting at a pin

.
Is the code given below correct?If not please tell why?
<
#include<reg51.H>
sbit IN = 0x90;
sbit OUT = 0xA0;
void delay(unsigned int);
void main()
{ while(1)
{ P1 = 0xFF;
P2 = 0x00;
while(IN == 1)
{ OUT = 1;
delay(3000);
} while(IN != 1)
{ OUT = 0;
delay(3000);
} }
} void delay(unsigned int count)
{ int i;
for(i=0;i<count;i++);
} />

0 J. dl2iac over 12 years ago

Well, the code is correct if it implements what is written in the specification.
So without that it is neither correct, nor incorrect.

#include<reg51.H>
sbit IN = 0x90;
sbit OUT = 0xA0;
void delay(unsigned int);
void main()
{
    while(1)
    {
        P1 = 0xFF;
        P2 = 0x00;
        while(IN == 1)
        {
            OUT = 1;
            delay(3000);
        }
        while(IN != 1)
        {
            OUT = 0;
            delay(3000);
        }
    }
}
void delay(unsigned int count)
{   int i;
    for(i=0;i<count;i++);
}