problem with elevator project pic16f877A

[osm3000]

I'm building a very simple project , which is the elevator control system.
every button represents a floor . for example , if the elevator x is in floor 1 & i pressed the button of the 4th floor , then the 7-segment will count form 1 up to 4.
the problem is that there is no output at all.
the code is for mikro c compiler.
the attached folder contains the proteus simulation.

**broken link removed**

another question : I'm using CCS & mikroC compilers , but many people advised me against CCS and in favor of mikroC ,,, form your experience , what do you prefer ?

The code for mikroC

void main() {
int x=0; // the elevator
int i = 0; //counter
int n[10] = {63,6,91,79,102,109,125,7,127,111}; //for the 7-seg output
TRISB=0; //OUTPUT
TRISD=0xff;
/*
D0 is the ground
D1 is the 1st floor
D2 is the 2nd floor
D3 is the 3rd floor
D4 is the 4th floor
D5 is the 5th floor
*/
portb=n[0];
while(1)
{
//ground floor
if (portd.B0==1)
{
if (x>0)
{
for(i = x;i<=0;i--)
{
PORTB=n;
;
}
x = 0;
}
else
{
PORTB=n[0];
x =0;
}
}
/////////////////////////1st floor
if (portd.B1==1)
{
if(x>1)
{
for(i = x;i<=1;i--)
{
PORTB=n;
;
}
x = 1;
}
else if (x<1)
{
for (i=x;i>=1;i++)
{
PORTB=n;
;
}
x=1;
}
}
/////////////////////2nd floor
if (portd.B2==1)
{
if(x>2)
{
for(i = x;i<=2;i--)
{
PORTB=n;
;
}
x = 2;
}
else if (x<2)
{
for (i=x;i>=2;i++)
{
PORTB=n;
;
}
x=2;
}
}
//////////////////////3rd floor
if (portd.B3==1)
{
if(x>3)
{
for(i = x;i<=3;i--)
{
PORTB=n;
;
}
x = 3;
//output_B(n[3]);
}
else if (x<3)
{
for (i=x;i>=3;i++)
{
PORTB=n;
;
}
x=3;
}
}
/////////////////////4th floor
if (portd.B4==1)
{
if(x>4)
{
for(i = x;i<=4;i--)
{
PORTB=n;
;
}
x = 4;
}
else if (x<4)
{
for (i=x;i>=4;i++)
{
PORTB=n;
;
}
x=4;
}
}
/////////////////////5th floor
if (portd.B5==1)
{
if(x>5)
{
PORTB=n;
x = 5;
}
else if (x<5)
{
for (i=x;i>=5;i++)
{
PORTB=n;
;
}
x=5;
}
}
}
}