cpp-while循环

 1 #include <iostream>
 2 #include <algorithm>
 3 int main()
 4 {
 5     std::cout<<"Enter two numbers:"<<std::endl;
 6     int sum = 0, val = 0, a = 0, b = 0, min = 0, max = 0;
 7     std::cin>>a>>b;
 8     min = std::min(a,b), max = std::max(a,b),val = min;
 9      while (val <= max)
10     {
11         sum += val;
12         ++val;
13         }
14     std::cout<<"The sum of "<<min<<" to "<<max<<"inclusive is "<<sum<<std::endl;
15     system("pause");
16     return 0;
17 }