Electronic – PIC microcontroller programmer/debugger tools for beginner

If I remember correctly (and manual seems to agree with me), mikroICD only supports mikroElektronika's development tools and searches aren't bringing any hacks. Since mikroE is playing the vendor lock-in card, you seem to be out of luck (although some sources claim that it's Microchip that's blocking the compatibility part). If the board has programing connector (I can't check right now), you could use a Pickit with it.

You could also try asking mikroE's support for any tips on assembly debugging. Some of their software my support it, but I haven't seen it mentioned anywhere in official documentation.

The most immediate problem I can see is the following line of code:

#include " 16F877A.h "

You should remove the spaces because it's trying to open a file that contains spaces which is why you're getting multiple errors related to that file. While in general extra whitespace doesn't matter a lot in C / C++ code for any literals enclosed in quotes it certainly does.

Another area where you shouldn't insert extra spaces is also between operators such as == so the space between those two characters should be removed from line 10 as well so it should look like this:

if(x == 1) output_high(PIN_D0); // Change output