в 14:21, 25 мая 2010

2010-05-25T14:21:17Z

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2010-05-25T10:30:19Z

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==A while true loop==

<source lang="cpp">#include <iostream>

int main()
{
int counter = 0;

while (1)
{
counter ++;
if (counter > 10)
break;
}
std::cout << "counter: " << counter << "\n";
return 0;
}</source>
<pre class=codeResult>counter: 11</pre>

==Calculate the sum of the integers from 1 to 10 using while loop==

<source lang="cpp">#include <iostream>
using std::cout;
using std::endl;
int main()
{
int sum;
int x;
x = 1;
sum = 0;
while ( x <= 10 )
{
sum += x;
x++;
}
cout << "The sum is: " << sum << endl;
return 0;
}</source>
<pre class=codeResult>The sum is: 55</pre>

==Counter-controlled repetition==

<source lang="cpp">#include <iostream>
using std::cout;
using std::endl;
int main()
{
int counter = 1;
while ( counter <= 10 )
{
cout << counter << " ";
counter++;
}
cout << endl;
return 0;
}</source>
<pre class=codeResult>1 2 3 4 5 6 7 8 9 10</pre>

==demonstrates WHILE loops using fibonacci series==

<source lang="cpp">#include <iostream>
using namespace std;

int main(){
const unsigned long limit = 4294967295;
unsigned long next=0;
unsigned long last=1;

while( next < limit / 2 )
{
cout << last << " ";
long sum = next + last;
next = last;
last = sum;
}
cout << endl;
return 0;
}</source>

==Display all printable characters including the extended character set==

<source lang="cpp">#include <iostream>
using namespace std;

int main()
{
unsigned char ch;

ch = 32;
while(ch) {
cout << ch;
ch++;
}

return 0;
}</source>
<pre class=codeResult>!"#$%&"()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmno
pqrstuvwxyz{|}.....</pre>

==Looping with while==

<source lang="cpp">#include <iostream>

int main()
{
int counter = 0;

while(counter < 5)
{
counter++;
std::cout << "Looping! ";
}

std::cout << "\nCounter: " << counter << ".\n";
return 0;
}</source>
<pre class=codeResult>Looping! Looping! Looping! Looping! Looping!
Counter: 5.</pre>

==Skip the body of the while loop when the condition is false==

<source lang="cpp">#include <iostream>

int main()
{
int counter = 3;
while (counter > 0)
{
std::cout << "Hello!\n";
counter--;
}
std::cout << "counter is OutPut: " << counter;
return 0;
}</source>
<pre class=codeResult>Hello!
Hello!
Hello!
counter is OutPut: 0</pre>

==Use three conditions in while statement==

<source lang="cpp">#include <iostream>

int main()
{
unsigned short small = 1;
unsigned long large = 123;
const unsigned short MAXSMALL=65535;

std::cout << "small: " << small << "...";

// for each iteration, test three conditions
while (small < large && large > 0 && small < MAXSMALL)
{
std::cout << ".";
small++;
large-=2;
}
std::cout << "\nSmall: " << small << " Large: " << large << std::endl;
return 0;
}</source>
<pre class=codeResult>small: 1............................................
Small: 42 Large: 41</pre>

==While statement with "and"&& ==

<source lang="cpp">#include <iostream>
using namespace std;

int main()
{
int len;

cout << "Enter length (1 to 79): ";
cin >> len;

while(len>0 && len<80) {
cout << ".";
len--;
}

return 0;
}</source>

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в 14:21, 25 мая 2010

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