Interfacing Subroutines with Parameter Passing

Let's now write a C program which calls the assembly program for parameter passing. Let's extend the previous two programs such that if on function call 0 is passed then cursor is turned off and if 1 is passed then cursor is turned on. Calling C program for such may look like:

# include < stdio.h 

voidcursw(int);

void main()

{

printf("%s\n", "the cursor is now turning off");

cursw(0); /* call to assembly routine with 0 as parameter

getchar();

printf("%s\n","the cursor is now turning on");

cursw(l); /* call to assembly routine with parameter as1.

   }

The variables in C or C + + are passed on the stack.