MFP lab 11

*************Addition

1. f1.c

#include<stdio.h>
#include<conio.h>

int a=60,b=70,c;

extern far int addition(int a,int b);

void main()
{

	clrscr();
	c=addition(a,b);
	printf("Addition=%d",c);
	getch();
}



2. f2.asm

; _ prefix when in asm variables when external

extrn _a:word
extrn _b:word
public _addition

code segment
  assume cs:code

  _addition proc far

    mov ax,_a
    add ax,_b
    ret
 _addition endp
code ends
end


;turbo C only takes from AX


**********Cel to fah

1. f1.c

#include<stdio.h>
#include<conio.h>

int c=60,f;

extern far int convert(int c);

void main()
{

	clrscr();
	f=convert(c);
	printf("f=%d",f);
	getch();
}



2. f2.asm

extrn _c:word

public _convert

code segment
  assume cs:code

  _convert proc far

    mov ax,_c
    mov bx,05
    div bx
    mov bx,09h
    mul bx
    mov bx,032
    add ax,bx
    ret
 _convert endp
code ends
end


***************LCM

1. C

#include<stdio.h>
#include<conio.h>

int a=5,b=10,c;

extern far int convert(int a,int b);

void main()
{
	clrscr();
	c=convert(a,b);
	printf("lcm=%d", c);
	getch();
}



2.


extrn _a:word
extrn _b:word

public _convert

code segment
  assume cs:code

  _convert proc far

     mov ax,_a
        mov bx,_b
one:    cmp ax,bx
        jc loop1

loop1:  xchg ax,bx
        jmp read

read:   sub ax,bx
        jnz one
        mov ax,bx
        mov ax,_a
        mov cx,_b
        mul cx
        div bx


        ret

 _convert endp
code ends
end











steps:
1. tasm f2.asm
2. open tc.exe
3. options ma case sensitive and output directory to \BIN
4. add obj and c to project
5. build all and run