20191208-while +if

1. #include "stdafx.h"

2. #include "iostream"

3. #include "string"

4. using namespace std;

5. int main()

6. { int line=0;

7.   char ch;

8.   while (cin.get(ch))

9.   {

10.   if(ch=='Q'){break;}

11.   if(ch!='\n'){continue;}   

12.   }

13. }

 

程序思路：第11号可有可无。

下一组代码：

1. #include "stdafx.h"

2. #include "iostream"

3. #include "string"

4. using namespace std;

5. inline double square(double x){return x*x;}

6. int main()

7. { 

8.   double a,b;

9.   double c=13.0;

10.   a=square(5.0);

11.   b=square(4.5+7.5);

12.   cout<<"a="<<a<<endl;

13.   cout<<"b="<<b<<endl;

14.   cout<<square(c++)<<endl;

15.   cout<<"c="<<c<<endl;

16.  

17. }

运行结果：