C program

EMPS intranet

Hi! Hi! Start main()

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...
 int main(){
   ... 

»  int mychar;

»  while (1) {
  // Read a character from stdin
»    mychar=getc(stdin);
»    if (mychar==EOF) 
      return 0;

»    printf("I read: \"%c\"\n", mychar);
    // Put it back
»    ungetc(mychar, stdin);

    // Read it again!
»    mychar=getc(stdin);
»    printf("Again I read: \"%c\"\n\n", mychar);
  }

}

Memory

main()
128	129	130	131
mychar = 1

NB: the actual memory address of each variable is the
address shown plus 4292252520 (0xFFD69368).

Show Advanced options

Input was:

abc

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

Output

I read: "a"
Again I read: "a"

I read: "b"
Again I read: "b"

I read: "c"
Again I read: "c"

I read: "
"
Again I read: "
"

Validate Link-check