- 格式：
statement1
while(test-expr)
statement2
statement3
- 举例：
int i = 0;
while(i < 10)
{
cout<< i << endl;
i++;
}
cout<<"after while"<
- 执行顺序
Created with Rapha?l 2.2.0 statement1 test_expr statement2 statement3 yes no
#include
#include
#include
using namespace std;
int main(int argc, char* argv[])
{
//while(test_condition) body
//for(init_expr;
test_expr;
update){ statement }
/*************************举例1*************************/
//读取字符串中的每一个字符
string s = "hellow world";
unsigned long size = s.size();
int i = -1;
while((++i) < size)
{
if (s[i] != ' ')
{
cout << "<" << s[i] << ">";
}
else
{
cout << s[i];
}
//i++;
最好先编写控制变量值的代码
}
cout << endl;
/*************************举例2*************************/
string ss = "I love you ";
auto p = begin(ss)-1;
auto endp = end(ss);
while ((++p) != endp)
{
if (*p != ' ')
{
cout << "<" << *p << ">";
}
else
{
cout << *p;
}
//p++;
最好先编写控制变量值的代码
}
return 0;
}
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