rand()%28 only generating multiples of 7
1
This code of C generates only multiples of 7 in Xcode:
#include <stdlib.h>
#include <time.h>
int main()
{
srand(time(NULL));
printf("%d", rand()%28);
}
It will also generate only multiples of 7 with multiples of 7 put in place of 28 (rand()%56 for example does the same thing). Any idea what's causing this problem? Thanks a lot for your help!
c xcode
asked Nov 12 '18 at 20:49
Patryk SzczypkowskiPatryk Szczypkowski
61
|
show 12 more comments
1
This code of C generates only multiples of 7 in Xcode:
#include <stdlib.h>
#include <time.h>
int main()
{
srand(time(NULL));
printf("%d", rand()%28);
}
It will also generate only multiples of 7 with multiples of 7 put in place of 28 (rand()%56 for example does the same thing). Any idea what's causing this problem? Thanks a lot for your help!
c xcode
asked Nov 12 '18 at 20:49
Patryk SzczypkowskiPatryk Szczypkowski
61
Cannot reproduce in MSVC, apart from the missing#include <stdio.h>
– Weather Vane
Nov 12 '18 at 20:52
1
See stackoverflow.com/a/18386648/10077
– Fred Larson
Nov 12 '18 at 21:01
1
@tadman thanks a lot for your input. I am doing a college assignment, and I meant to use functions I learnt from lectures, but as always stackoverflow community doesn't disappoint, and teaches me better techniques. Thanks all!
– Patryk Szczypkowski
Nov 12 '18 at 22:08
1
@tadman thank you! I am aware of that, and that is why I am always trying to learn more from my assignment, than they were originally designed to teach me.
– Patryk Szczypkowski
Nov 14 '18 at 18:20
1
@tadman thank you, definitely going to check it out!
– Patryk Szczypkowski
Nov 15 '18 at 21:06
|
show 12 more comments
1
1
1
0
This code of C generates only multiples of 7 in Xcode:
#include <stdlib.h>
#include <time.h>
int main()
{
srand(time(NULL));
printf("%d", rand()%28);
}
It will also generate only multiples of 7 with multiples of 7 put in place of 28 (rand()%56 for example does the same thing). Any idea what's causing this problem? Thanks a lot for your help!
c xcode
asked Nov 12 '18 at 20:49
Patryk SzczypkowskiPatryk Szczypkowski
61
This code of C generates only multiples of 7 in Xcode:
#include <stdlib.h>
#include <time.h>
int main()
{
srand(time(NULL));
printf("%d", rand()%28);
}
It will also generate only multiples of 7 with multiples of 7 put in place of 28 (rand()%56 for example does the same thing). Any idea what's causing this problem? Thanks a lot for your help!
c xcode
c xcode
asked Nov 12 '18 at 20:49
Patryk SzczypkowskiPatryk Szczypkowski
61
asked Nov 12 '18 at 20:49
Patryk SzczypkowskiPatryk Szczypkowski
61
asked Nov 12 '18 at 20:49
Patryk SzczypkowskiPatryk Szczypkowski
61
asked Nov 12 '18 at 20:49
Patryk SzczypkowskiPatryk Szczypkowski
61
asked Nov 12 '18 at 20:49
Patryk SzczypkowskiPatryk Szczypkowski
61
61
Cannot reproduce in MSVC, apart from the missing#include <stdio.h>
– Weather Vane
Nov 12 '18 at 20:52
1
See stackoverflow.com/a/18386648/10077
– Fred Larson
Nov 12 '18 at 21:01
1
@tadman thanks a lot for your input. I am doing a college assignment, and I meant to use functions I learnt from lectures, but as always stackoverflow community doesn't disappoint, and teaches me better techniques. Thanks all!
– Patryk Szczypkowski
Nov 12 '18 at 22:08
1
@tadman thank you! I am aware of that, and that is why I am always trying to learn more from my assignment, than they were originally designed to teach me.
– Patryk Szczypkowski
Nov 14 '18 at 18:20
1
@tadman thank you, definitely going to check it out!
– Patryk Szczypkowski
Nov 15 '18 at 21:06
|
show 12 more comments
Cannot reproduce in MSVC, apart from the missing#include <stdio.h>
– Weather Vane
Nov 12 '18 at 20:52
1
See stackoverflow.com/a/18386648/10077
– Fred Larson
Nov 12 '18 at 21:01
1
@tadman thanks a lot for your input. I am doing a college assignment, and I meant to use functions I learnt from lectures, but as always stackoverflow community doesn't disappoint, and teaches me better techniques. Thanks all!
– Patryk Szczypkowski
Nov 12 '18 at 22:08
1
@tadman thank you! I am aware of that, and that is why I am always trying to learn more from my assignment, than they were originally designed to teach me.
– Patryk Szczypkowski
Nov 14 '18 at 18:20
1
@tadman thank you, definitely going to check it out!
– Patryk Szczypkowski
Nov 15 '18 at 21:06
Cannot reproduce in MSVC, apart from the missing
#include <stdio.h>– Weather Vane
Nov 12 '18 at 20:52
Cannot reproduce in MSVC, apart from the missing
#include <stdio.h>– Weather Vane
Nov 12 '18 at 20:52
1
1
See stackoverflow.com/a/18386648/10077
– Fred Larson
Nov 12 '18 at 21:01
See stackoverflow.com/a/18386648/10077
– Fred Larson
Nov 12 '18 at 21:01
1
1
@tadman thanks a lot for your input. I am doing a college assignment, and I meant to use functions I learnt from lectures, but as always stackoverflow community doesn't disappoint, and teaches me better techniques. Thanks all!
– Patryk Szczypkowski
Nov 12 '18 at 22:08
@tadman thanks a lot for your input. I am doing a college assignment, and I meant to use functions I learnt from lectures, but as always stackoverflow community doesn't disappoint, and teaches me better techniques. Thanks all!
– Patryk Szczypkowski
Nov 12 '18 at 22:08
1
1
@tadman thank you! I am aware of that, and that is why I am always trying to learn more from my assignment, than they were originally designed to teach me.
– Patryk Szczypkowski
Nov 14 '18 at 18:20
@tadman thank you! I am aware of that, and that is why I am always trying to learn more from my assignment, than they were originally designed to teach me.
– Patryk Szczypkowski
Nov 14 '18 at 18:20
1
1
@tadman thank you, definitely going to check it out!
– Patryk Szczypkowski
Nov 15 '18 at 21:06
@tadman thank you, definitely going to check it out!
– Patryk Szczypkowski
Nov 15 '18 at 21:06
|
show 12 more comments
0
active
oldest
votes
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
});
}
});
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
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53269886%2frand28-only-generating-multiples-of-7%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
0
active
oldest
votes
0
active
oldest
votes
active
oldest
votes
active
oldest
votes
draft saved
draft discarded
Thanks for contributing an answer to Stack Overflow!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
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
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53269886%2frand28-only-generating-multiples-of-7%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
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
Required, but never shown
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
Required, but never shown
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
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Cannot reproduce in MSVC, apart from the missing
#include <stdio.h>– Weather Vane
Nov 12 '18 at 20:52
1
See stackoverflow.com/a/18386648/10077
– Fred Larson
Nov 12 '18 at 21:01
1
@tadman thanks a lot for your input. I am doing a college assignment, and I meant to use functions I learnt from lectures, but as always stackoverflow community doesn't disappoint, and teaches me better techniques. Thanks all!
– Patryk Szczypkowski
Nov 12 '18 at 22:08
1
@tadman thank you! I am aware of that, and that is why I am always trying to learn more from my assignment, than they were originally designed to teach me.
– Patryk Szczypkowski
Nov 14 '18 at 18:20
1
@tadman thank you, definitely going to check it out!
– Patryk Szczypkowski
Nov 15 '18 at 21:06