blocks|key|3718823|text|您可以向do-while-loop添加条件|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|3718824|int+main(){
+++srand(static_cast<unsigned+int>(time(0)));+//+seed+number+generator

+++int+secretNumber+=+rand()+%25+100+%2B+1;
+++int+tries+=+0;
+++int+guess;

+++cout+<<+"\tWelcome+to+Guess+my+Number\n\n";
+++do{
++++cout+<<+"Enter+a+guess:+";
++++cin+>>+guess;
++++%2B%2Btries;

++++if+(guess+>+secretNumber){
++++++++cout+<<+"Too+high\n";
++++}+else+if+(guess+<+secretNumber){
++++++++cout+<<+"Too+low+\n";
++++}+else+{
++++++++cout+<<+"You+got+it+:)+in+"+<<+tries+<<+"+tries+\n\n";
++++}
+++}+while((guess+!=+secretNumber)+&&+(tries+<+6));
}|code-block|syntax|javascript|3718825|entityMap^0|4|D|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|P|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Q|8|@]|D|@]|E|$]]]|L|$]]

you can add a condition to your <code>do-while-loop</code>

<pre><code>int main(){
 srand(static_cast&lt;unsigned int&gt;(time(0))); // seed number generator

 int secretNumber = rand() % 100 + 1;
 int tries = 0;
 int guess;

 cout &lt;&lt; "\tWelcome to Guess my Number\n\n";
 do{
 cout &lt;&lt; "Enter a guess: ";
 cin &gt;&gt; guess;
 ++tries;

 if (guess &gt; secretNumber){
 cout &lt;&lt; "Too high\n";
 } else if (guess &lt; secretNumber){
 cout &lt;&lt; "Too low \n";
 } else {
 cout &lt;&lt; "You got it :) in " &lt;&lt; tries &lt;&lt; " tries \n\n";
 }
 } while((guess != secretNumber) &amp;&amp; (tries &lt; 6));
}
</code></pre>

blocks|key|1402742|text|我不确定是否有最好的方法。正如您所说的，有两种可能，要么在while中添加条件|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1402743|while(guess+!=+secretNumber+&&+tries+<+6);|code-block|syntax|javascript|1402744|或者你也可以选择|1402745|else+if(tries+>+5)
{
++++cout+<<+"You+are+out+of+tries,+better+luck+next+time+;)+\n"
++++break;
}|1402746|比起while，我更喜欢有附加条件的那个。但这只是我个人的观点。我遇到了想要做else+if的程序员，并试图保持循环条件相对简单。使用更复杂的if/boolean语句，您可以提取具有适当名称的函数。在您的情况下，可以这样做|1402747|+bool+isEndGame(int+guess,+int+secretNumber,+int+tries)
+{
+++++return+(guess+!=+secretNumber)+&&+(tries+<+6);
+}

+int+main()
+{
+++srand(static_cast<unsigned+int>(time(0)));+//+seed+number+generator

+++int+secretNumber+=+rand()+%25+100+%2B+1;
+++int+tries+=+0;
+++int+guess;

+++cout+<<+"\tWelcome+to+Guess+my+Number\n\n";
+++do{
++++cout+<<+"Enter+a+guess:+";
++++cin+>>+guess;
++++%2B%2Btries;

++++if+(guess+>+secretNumber){
++++++++cout+<<+"Too+high\n";
++++}+else+if+(guess+<+secretNumber){
++++++++cout+<<+"Too+low+\n";
++++}+else+{
++++++++cout+<<+"You+got+it+:)+in+"+<<+tries+<<+"+tries+\n\n";
++++}
+++}+while+(isEndGame(guess,+secretNumber,+tries));
}|1402748|在我看来，最后一个是最好的选择。你不需要考虑条件，其他程序员现在就能清楚它的含义了。|1402749|entityMap^0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|U|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|W|8|@]|9|@]|A|$]]|$1|M|3|N|5|D|7|X|8|@]|9|@]|A|$E|F]]|$1|O|3|P|5|6|7|Y|8|@]|9|@]|A|$]]|$1|Q|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]]|R|$]]

I am not sure if there is the best approach. As you said there are 2 possibilities either add condition in while 

<pre><code>while(guess != secretNumber &amp;&amp; tries &lt; 6);
</code></pre>

or you can go with 

<pre><code>else if(tries &gt; 5)
{
 cout &lt;&lt; "You are out of tries, better luck next time ;) \n"
 break;
}
</code></pre>

I would prefer the one with adding condition to while. But this is my personal opinion. I meet programmer that wants to do the else if and try to keep loop condition relatively simple. With more complex if/boolean statements you can extract a function with proper name. In your case it can be done like this 

<pre><code> bool isEndGame(int guess, int secretNumber, int tries)
 {
 return (guess != secretNumber) &amp;&amp; (tries &lt; 6);
 }

 int main()
 {
 srand(static_cast&lt;unsigned int&gt;(time(0))); // seed number generator

 int secretNumber = rand() % 100 + 1;
 int tries = 0;
 int guess;

 cout &lt;&lt; "\tWelcome to Guess my Number\n\n";
 do{
 cout &lt;&lt; "Enter a guess: ";
 cin &gt;&gt; guess;
 ++tries;

 if (guess &gt; secretNumber){
 cout &lt;&lt; "Too high\n";
 } else if (guess &lt; secretNumber){
 cout &lt;&lt; "Too low \n";
 } else {
 cout &lt;&lt; "You got it :) in " &lt;&lt; tries &lt;&lt; " tries \n\n";
 }
 } while (isEndGame(guess, secretNumber, tries));
}
</code></pre>

In my opinion the last one is the best choice. You don't need to think about condition and other programmers can clearly now what it means.

blocks|key|1297310|text|我只是做了一些“试错”，还添加了另一个循环来“再次播放”。这是代码。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1297311|int+main(){
+++char+again+=+'y';
+++do{
+++++++srand(static_cast<unsigned+int>(time(0)));+//+seed+number+generator
+++++++int+secretNumber+=+rand()+%25+100+%2B+1;
+++++++int+tries+=+0;
+++++++int+guess;

+++++++cout+<<+"\tWelcome+to+Guess+my+Number\n\n";
+++++++do{
++++++++cout+<<+"Enter+a+guess:+";
++++++++cin+>>+guess;
++++++++%2B%2Btries;

++++++++if+(guess+>+secretNumber){
++++++++++++cout+<<+"Too+high\n";
++++++++}+else+if+(guess+<+secretNumber){
++++++++++++cout+<<+"Too+low+\n";
++++++++}+else+{
++++++++++++cout+<<+"You+got+it+:)+in+"+<<+tries+<<+"+tries+\n\n";
++++++++}
+++++++}+while((guess+!=+secretNumber)+&&+(tries+<+6));
++++++++cout+<<+"Too+many+tries+\n\n";
++++++++cout+<<+"Start+again?:+";
++++++++cin+>>+again;
+++}+while(again+==+'y');
+}|code-block|syntax|javascript|1297312|我是一个尽可能优化代码的倡导者，以使它更快，使用更少的系统资源。有没有人可以检查一下我是否可以进一步调整它来优化它？|1297313|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

I just did some "trial and error" and also added another loop to "play again". Here's the code.

<pre><code>int main(){
 char again = 'y';
 do{
 srand(static_cast&lt;unsigned int&gt;(time(0))); // seed number generator
 int secretNumber = rand() % 100 + 1;
 int tries = 0;
 int guess;

 cout &lt;&lt; "\tWelcome to Guess my Number\n\n";
 do{
 cout &lt;&lt; "Enter a guess: ";
 cin &gt;&gt; guess;
 ++tries;

 if (guess &gt; secretNumber){
 cout &lt;&lt; "Too high\n";
 } else if (guess &lt; secretNumber){
 cout &lt;&lt; "Too low \n";
 } else {
 cout &lt;&lt; "You got it :) in " &lt;&lt; tries &lt;&lt; " tries \n\n";
 }
 } while((guess != secretNumber) &amp;&amp; (tries &lt; 6));
 cout &lt;&lt; "Too many tries \n\n";
 cout &lt;&lt; "Start again?: ";
 cin &gt;&gt; again;
 } while(again == 'y');
 }
</code></pre>

I am an advocate of optimizing the code as much as possible to make it faster and use less system resources. Can someone please review if I can tweak it further to optimize it?

blocks|key|3718952|text|另一种选择是使用for循环，并在正确答案时中断：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3718953|int+main(){
+++srand(static_cast<unsigned+int>(time(0)));+//+seed+number+generator

+++int+secretNumber+=+rand()+%25+100+%2B+1;

+++cout+<<+"\tWelcome+to+Guess+my+Number\n\n";
+++for+(+int+tries+=+1;+tries+<+6;+tries%2B%2B+)+{
++++int+guess;
++++cout+<<+"Enter+a+guess:+";
++++cin+>>+guess;

++++if+(guess+>+secretNumber){
++++++++cout+<<+"Too+high\n";
++++}+else+if+(guess+<+secretNumber){
++++++++cout+<<+"Too+low+\n";
++++}+else+{
++++++++cout+<<+"You+got+it+:)+in+"+<<+tries+<<+"+tries+\n\n";
++++++++break;
++++}
+++}
}|code-block|syntax|javascript|3718954|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Another option would be to use a for loop and break on the correct answer:

<pre><code>int main(){
 srand(static_cast&lt;unsigned int&gt;(time(0))); // seed number generator

 int secretNumber = rand() % 100 + 1;

 cout &lt;&lt; "\tWelcome to Guess my Number\n\n";
 for ( int tries = 1; tries &lt; 6; tries++ ) {
 int guess;
 cout &lt;&lt; "Enter a guess: ";
 cin &gt;&gt; guess;

 if (guess &gt; secretNumber){
 cout &lt;&lt; "Too high\n";
 } else if (guess &lt; secretNumber){
 cout &lt;&lt; "Too low \n";
 } else {
 cout &lt;&lt; "You got it :) in " &lt;&lt; tries &lt;&lt; " tries \n\n";
 break;
 }
 }
}
</code></pre>

I have this simple guess my number code as I am learning C++. As you can see it selects a random number and lets the user guess it and records the number of tries.

<pre><code>int main(){
 srand(static_cast&lt;unsigned int&gt;(time(0))); // seed number generator

 int secretNumber = rand() % 100 + 1;
 int tries = 0;
 int guess;

 cout &lt;&lt; "\tWelcome to Guess my Number\n\n";
 do{
 cout &lt;&lt; "Enter a guess: ";
 cin &gt;&gt; guess;
 ++tries;

 if (guess &gt; secretNumber){
 cout &lt;&lt; "Too high\n";
 } else if (guess &lt; secretNumber){
 cout &lt;&lt; "Too low \n";
 } else {
 cout &lt;&lt; "You got it :) in " &lt;&lt; tries &lt;&lt; " tries \n\n";
 }
 } while(guess != secretNumber);
}
</code></pre>

While this is working correctly, I also want user to have only 5 tries. I can think of adding another <code>else if</code> statement to ensure that <code>(tries &lt; 6)</code>.

OR

I can create another while loop inside <code>do</code> and ensure that <code>(tries &lt; 6)</code>. 

What would be the best approach here?

Guess my number c++ while loop inside a loop

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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问猜猜我的数字c++ while循环中的循环
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