diff --git a/lesson16/l16 b/lesson16/l16
new file mode 100755
index 0000000..22225d6
Binary files /dev/null and b/lesson16/l16 differ
diff --git a/lesson16/l16.asm b/lesson16/l16.asm
new file mode 100644
index 0000000..a0e81ee
--- /dev/null
+++ b/lesson16/l16.asm
@@ -0,0 +1,26 @@
+
+; %include '../lib/fl.asm' ; local
+%include 'lib/fl.asm' ; build.sh
+
+SECTION	.text
+global	_start
+
+_start:
+pop	ecx
+pop	edx
+sub	ecx, 1
+mov	edx, 0
+
+nextArg:
+cmp	ecx, 0h
+jz	noMoreArgs
+pop	eax
+call	atoi
+add	edx, eax
+dec	ecx
+jmp	nextArg
+
+noMoreArgs:
+mov	eax, edx
+call	iprintLF
+call	quit
diff --git a/lesson16/l16.o b/lesson16/l16.o
new file mode 100644
index 0000000..37dcbd1
Binary files /dev/null and b/lesson16/l16.o differ
diff --git a/lesson17/l17 b/lesson17/l17
new file mode 100755
index 0000000..dd18660
Binary files /dev/null and b/lesson17/l17 differ
diff --git a/lesson17/l17.asm b/lesson17/l17.asm
new file mode 100644
index 0000000..8ed90e7
--- /dev/null
+++ b/lesson17/l17.asm
@@ -0,0 +1,44 @@
+
+; %include '../lib/fl.asm' ; local
+%include 'lib/fl.asm' ; build.sh
+
+SECTION	.data
+msg1	db	'Jumping to finished label.', 0h
+msg2	db	'Inside subroutine number: ', 0h
+msg3	db	'Inside subroutine "finished".', 0h
+
+SECTION	.text
+global	_start
+
+_start:
+subroutineOne:
+mov	eax, msg1
+call	sprintLF
+jmp	.finished
+
+.finished:
+mov	eax, msg2
+call	sprint
+mov	eax, 1
+call	iprintLF
+
+subroutineTwo:
+mov	eax, msg1
+call	sprintLF
+jmp	.finished
+
+.finished:
+mov	eax, msg2
+call	sprint
+mov	eax, 2
+call	iprintLF
+
+mov	eax, msg1
+call	sprintLF
+jmp	finished
+
+finished:
+mov	eax, msg3
+call	sprintLF
+call	quit
+
diff --git a/lesson17/l17.o b/lesson17/l17.o
new file mode 100644
index 0000000..43b7582
Binary files /dev/null and b/lesson17/l17.o differ
diff --git a/lesson18/l18 b/lesson18/l18
new file mode 100755
index 0000000..9844b0a
Binary files /dev/null and b/lesson18/l18 differ
diff --git a/lesson18/l18.asm b/lesson18/l18.asm
new file mode 100644
index 0000000..cd189f7
--- /dev/null
+++ b/lesson18/l18.asm
@@ -0,0 +1,60 @@
+
+; %include '../lib/fl.asm' ; local
+%include 'lib/fl.asm' ; build.sh
+
+SECTION	.data
+fizz	db	'Fizz', 0h
+buzz	db	'Buzz', 0h
+
+SECTION	.text
+global	_start
+
+_start:
+mov	esi, 0
+mov	edi, 0
+mov	ecx, 0
+
+nextNumber:
+inc	ecx
+
+.checkFizz:
+mov	edx, 0
+mov	eax, ecx
+mov	ebx, 3
+div	ebx
+mov	edi, edx
+cmp	edi, 0
+jne	.checkBuzz
+mov	eax, fizz
+call	sprint
+
+.checkBuzz:
+mov	edx, 0
+mov	eax, ecx
+mov	ebx, 5
+div	ebx
+mov	esi, edx
+cmp	esi, 0
+jne	.checkInt
+mov	eax, buzz
+call	sprint
+
+.checkInt:
+cmp	edi, 0
+je	.continue
+cmp	esi, 0
+je	.continue
+mov	eax, ecx
+call	iprint
+
+.continue:
+mov	eax, 0Ah
+push	eax
+mov	eax, esp
+call	sprint
+pop	eax
+cmp	ecx, 100
+jne	nextNumber
+
+call	quit
+
diff --git a/lesson18/l18.o b/lesson18/l18.o
new file mode 100644
index 0000000..7c23e2e
Binary files /dev/null and b/lesson18/l18.o differ
diff --git a/lib/fl.asm b/lib/fl.asm
index a25a640..9d606f1 100644
--- a/lib/fl.asm
+++ b/lib/fl.asm
@@ -1,3 +1,46 @@
+
+;------------------------------------------
+; int atoi(Integer number)
+; Ascii to integer function (atoi)
+atoi:
+push	ebx
+push	ecx
+push	edx
+push	esi
+mov	esi, eax
+mov	eax, 0
+mov	ecx, 0
+
+.multiplyLoop:
+xor	ebx, ebx
+mov	bl, [esi+ecx]
+cmp	bl, 48
+jl	.finished
+cmp	bl, 57
+jg	.finished
+
+sub	bl, 48
+add	eax, ebx
+mov	ebx, 10
+mul	ebx
+inc	ecx
+jmp	.multiplyLoop
+
+.finished:
+cmp	ecx, 0
+je	.restore
+mov	ebx, 10
+div	ebx
+
+.restore:
+pop	esi
+pop	edx
+pop	ecx
+pop	ebx
+ret
+
+
+
 ;------------------------------------------
 ; void iprint(Integer number)
 ; Integer printing function (itoa)
@@ -8,7 +51,7 @@ push	edx
 push	esi
 mov	ecx, 0
 
-divideLoop:
+.divideLoop:
 inc	ecx
 mov	edx, 0
 mov	esi, 10
@@ -16,15 +59,15 @@ idiv	esi
 add	edx, 48
 push	edx
 cmp	eax, 0
-jnz	divideLoop
+jnz	.divideLoop
 
-printLoop:
+.printLoop:
 dec	ecx
 mov	eax, esp
 call	sprint
 pop	eax
 cmp	ecx, 0
-jnz	printLoop
+jnz	.printLoop
 
 pop	esi
 pop	edx
@@ -58,13 +101,13 @@ slen:
 push    ebx
 mov     ebx, eax
 
-nextchar:
+.nextchar:
 cmp     byte [eax], 0
-jz      finished
+jz      .finished
 inc     eax
-jmp     nextchar
+jmp     .nextchar
 
-finished:
+.finished:
 sub     eax, ebx
 pop     ebx
 ret
@@ -109,7 +152,7 @@ push    eax
 mov     eax, esp
 call    sprint
 pop     eax
-pop eax
+pop	eax
 ret