How to diagram the call stack:

$1.$ Start with main

a$.$ Walk through each line of code, adding and modifying the variables

$2.$ When main calls a function, add a stack frame for that function, and start by adding the

parameters to the stack frame

$3.$ Walk through each line of code in the function, adding and modifying variables

$4.$ When the last line of the function is reached, return to main, crossing off the stack frame

for the function.

a$.$ Remember to record any returned values in main

$5.$ Repeat steps $24$ until the end of main is reached.

Note: Once a function is finished running, it is no longer present on the call stack. You can

simply not draw it or cross it out if you$$ve already drawn it$.$

Problem $1$:

Diagram the call stack for the following program at line $19$ and $12.$

Note: function header comments have been removed to save space

$1$

$2$

$3$

$4$

$5$

$6$

$7$

$8$

$9$

$10$

$11$

$12$

$13$

$14$

$15$

$16$

$17$

$18$

$19$

$20$

$21$

$22$

$23$

$24$

#include

$//$ function prototype

float convert$\_$inch$\_$to$\_$feet$($float$)$;

int main$($void$)\{$

float in$\_$inches $=83$;

float in$\_$feet $=$ convert$\_$inch$\_$to$\_$feet$($in$\_$inches$)$;

printf$("\%\mathrm{.}2$f inches is $\%\mathrm{.}2$f feet.

$",$ in$\_$inches, in$\_$feet$)$;

$//$ Diagram here

return $0$;

$\}$

float convert$\_$inch$\_$to$\_$feet$($float val$\_$inch$)\{$

float val$\_$feet $=$ val$\_$inch $/12\mathrm{.}0$;

$//$Diagram here

return val$\_$feet;

$\}$

Line $19$:

Line $12$: