Vjylku

“Since the train was delayed for more than an hour, passengers were given a full refund.” – Why is there no article before “passengers”?

How is an IPA symbol that lacks a name (e.g. ɲ) called?

What could prevent concentrated local exploration?

Weaponising the Grasp-at-a-Distance spell

Pointing to problems without suggesting solutions

What is the ongoing value of the Kanban board to the developers as opposed to management

Are there any AGPL-style licences that require source code modifications to be public?

Has a Nobel Peace laureate ever been accused of war crimes?

Are bags of holding fireproof?

Can I take recommendation from someone I met at a conference?

What documents does someone with a long-term visa need to travel to another Schengen country?

Is there a verb for listening stealthily?

Why did Israel vote against lifting the American embargo on Cuba?

What is the definining line between a helicopter and a drone a person can ride in?

Can I feed enough spin up electron to a black hole to affect its angular momentum?

false 'Security alert' from Google - every login generates mails from 'no-reply@accounts.google.com'

When speaking, how do you change your mind mid-sentence?

Why doesn't the university give past final exams' answers?

Who's this lady in the war room?

Why these surprising proportionalities of integrals involving odd zeta values?

Married in secret, can marital status in passport be changed at a later date?

Compiling and throwing simple dynamic exceptions at runtime for JVM

What kind of capacitor is this in the image?

What's the connection between Mr. Nancy and fried chicken?

Recursive calls to a function - why is the address of the parameter passed to it lowering with each call?

.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty{ height:90px;width:728px;box-sizing:border-box;
}

6

Consider following code:

#include <iostream>

using namespace std;

void test_func(int address) {

    cout<<&address<<" ";

    if(address < 0x7FFBEE26) {

        test_func(address);

    }

}

int main()

{

    test_func(512);

    cout<<"Hello";

    return 0;

}

Hello from main() is certainly not reached, since the recursive calls to test_func never end.

However, from what I can see in the cout present in test_func - the addresses being printed are lower and lower with each iteration. Why is that happening?

c++

share|improve this question

edited 33 mins ago

drescherjm

6,58923553

asked 54 mins ago

tears allotears allo

311

New contributor

tears allo is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  You are passing a copy - that has to have an address
  
  – UnholySheep
  52 mins ago
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  Remember that the default stack size on linux is 10MB and its 1 MB on windows. Also the stack need not be in the same location each time you run your program.
  
  – drescherjm
  38 mins ago
  
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I can't understand why this isn't eligible for tail-call optimization. The invocation of test_func is the last line in the function...
  
  – cyberbisson
  9 mins ago
  
  
  

  
  
  
  

add a comment | 

6

Consider following code:

#include <iostream>

using namespace std;

void test_func(int address) {

    cout<<&address<<" ";

    if(address < 0x7FFBEE26) {

        test_func(address);

    }

}

int main()

{

    test_func(512);

    cout<<"Hello";

    return 0;

}

Hello from main() is certainly not reached, since the recursive calls to test_func never end.

However, from what I can see in the cout present in test_func - the addresses being printed are lower and lower with each iteration. Why is that happening?

c++

share|improve this question

edited 33 mins ago

drescherjm

6,58923553

asked 54 mins ago

tears allotears allo

311

New contributor

tears allo is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  You are passing a copy - that has to have an address
  
  – UnholySheep
  52 mins ago
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  Remember that the default stack size on linux is 10MB and its 1 MB on windows. Also the stack need not be in the same location each time you run your program.
  
  – drescherjm
  38 mins ago
  
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I can't understand why this isn't eligible for tail-call optimization. The invocation of test_func is the last line in the function...
  
  – cyberbisson
  9 mins ago
  
  
  

  
  
  
  

add a comment | 

Consider following code:

#include <iostream>

using namespace std;

void test_func(int address) {

    cout<<&address<<" ";

    if(address < 0x7FFBEE26) {

        test_func(address);

    }

}

int main()

{

    test_func(512);

    cout<<"Hello";

    return 0;

}

Hello from main() is certainly not reached, since the recursive calls to test_func never end.

However, from what I can see in the cout present in test_func - the addresses being printed are lower and lower with each iteration. Why is that happening?

c++

share|improve this question

edited 33 mins ago

drescherjm

6,58923553

asked 54 mins ago

tears allotears allo

311

New contributor

tears allo is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

#include <iostream>

using namespace std;

void test_func(int address) {

    cout<<&address<<" ";

    if(address < 0x7FFBEE26) {

        test_func(address);

    }

}

int main()

{

    test_func(512);

    cout<<"Hello";

    return 0;

}

share|improve this question

edited 33 mins ago

drescherjm

6,58923553

asked 54 mins ago

tears allotears allo

311

New contributor

tears allo is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

share|improve this question

edited 33 mins ago

drescherjm

6,58923553

asked 54 mins ago

tears allotears allo

311

New contributor

tears allo is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

edited 33 mins ago

drescherjm

6,58923553

edited 33 mins ago

drescherjm

6,58923553

asked 54 mins ago

tears allotears allo

311

New contributor

tears allo is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

asked 54 mins ago

tears allotears allo

311

1 Answer
1

active

oldest

votes

10

Likely address is being placed on the stack and, on your platform, the stack grows downward in memory. See this question about stack growth direction for more.

share|improve this answer

answered 52 mins ago

David SchwartzDavid Schwartz

140k14145232

add a comment | 

Your Answer

StackExchange.ifUsing("editor", function () {
StackExchange.using("externalEditor", function () {
StackExchange.using("snippets", function () {
StackExchange.snippets.init();
});
});
}, "code-snippets");

StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "1"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);

StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});

function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});


}
});

tears allo is a new contributor. Be nice, and check out our Code of Conduct.

draft saved

draft discarded

Sign up or log in

StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});

Sign up using Google

Sign up using Facebook

Sign up using Email and Password

Post as a guest

Name

Email

Required, but never shown

StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f55800947%2frecursive-calls-to-a-function-why-is-the-address-of-the-parameter-passed-to-it%23new-answer', 'question_page');
}
);

Post as a guest

Name

Email

Required, but never shown

10

Likely address is being placed on the stack and, on your platform, the stack grows downward in memory. See this question about stack growth direction for more.

share|improve this answer

answered 52 mins ago

David SchwartzDavid Schwartz

140k14145232

add a comment | 

10

Likely address is being placed on the stack and, on your platform, the stack grows downward in memory. See this question about stack growth direction for more.

share|improve this answer

answered 52 mins ago

David SchwartzDavid Schwartz

140k14145232

add a comment | 

Likely address is being placed on the stack and, on your platform, the stack grows downward in memory. See this question about stack growth direction for more.

share|improve this answer

answered 52 mins ago

David SchwartzDavid Schwartz

140k14145232

share|improve this answer

answered 52 mins ago

David SchwartzDavid Schwartz

140k14145232

answered 52 mins ago

David SchwartzDavid Schwartz

140k14145232

answered 52 mins ago

David SchwartzDavid Schwartz

140k14145232