Data commit

Task/Pascals-triangle/X86-Assembly/pascals-triangle.x86

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+%include "io.inc"
+
+section .text
+global CMAIN
+CMAIN:
+	mov ebx, 7 ;size
+	call mloop
+	ret
+	
+mloop:
+	mov edx, 0 ;edx stands for the nth line
+looping:
+	push ebx
+	push edx
+	call line
+	pop edx
+	pop ebx
+	inc edx
+	cmp edx, ebx
+	jl looping
+	xor eax, eax
+	ret
+	
+line:
+	mov ecx, 0 ;ecx stands for the nth character in each line
+	mlp:
+		push ecx
+                push edx
+		call nCk
+                pop edx
+		pop ecx
+		PRINT_DEC 4, eax ;print returned number
+                PRINT_STRING " "
+		inc ecx
+		cmp ecx, edx ;if
+		jle mlp
+		NEWLINE
+		ret
+		
+nCk:
+	;ecx : j
+	;edx : i
+	mov esi, edx
+	call fac ;i!
+	push eax ;save i!
+	mov esi, ecx
+	call fac ;j!
+	push eax ;save j!
+	mov ebx, edx
+	sub ebx, ecx ;(i-j)
+	mov esi, ebx
+	call fac ;(i-j)!
+	pop ebx ;(i-j)! is in eax
+	mul ebx ;(i-j)! * j!
+	mov ecx, eax
+	pop eax ; get i!
+	div ecx ; ; last step : i! divided by (i-j)! * j!
+	ret
+	
+fac:
+	push ecx
+        push edx
+	mov eax, 1
+	mov ecx, esi
+	cmp ecx, 0 ; 0! returns 1
+	je facz
+	lp:
+		mul ecx ;multiplies eax by ecx and then decrements ecx until ecx is 0
+		dec ecx
+		cmp ecx, 0
+		jg lp
+		jmp end
+	facz:
+		mov eax, 1
+	end:
+                pop edx
+		pop ecx
+		ret