Skip to content
EMPS intranet
Back to top
Hi!   Hi!           Start program

Try stepping through the code


  Value and type of last evaluated expression: Address of array element: Address of array elementx:  (none)

Your browser does not support the canvas element which will make some the features unavailable.

If you are using Internet Explorer within the University of Exeter try going to the Settings menu (probably the gear shape at the top right of this page), selecting "Compatibility View settings", unchecking "Display intranet sites in Compatibility View" and reloading this page.

Code

 Header...

// Change the value of "val" 
// (Won't work!)

 void badfun(int val){
»  val=100+val;
}
 ... 


 int main(){
»  int val=1;

»  printf("Was: %d\n", val);
»  badfun(val);
»  printf("Now: %d\n", val);

»  return 0;
}
 ...

Data

badfun()

val (int)
128
1

main()

val (int)
168
1

Memory

badfun()

128
129
130
131
val = 1

main()

168
169
170
171
val = 1

NB: the actual memory address of each variable is the
address shown plus 4289091536 (0xFFA657D0).

Show Advanced options

.
Show output (Before looking at the output, work out what you think it put should be and see if you are right.)

Output

Was: 1
Now: 1
                                                                                                                                                                                                                                                                       
Validate   Link-check © Copyright & disclaimer Share
Back to top