为什么这个while循环结束？

Question

我将来自C++ Primer的代码复制为while循环的示例,并且它不输出任何内容.我正在使用g ++.

#include <iostream>

int main()
{
    int sum = 0, val = 1;
    // keep executing the while as long val is less than or equal to 10
    while (val <= 10) {
        sum += val;     // assigns sum+ val to sum\
        ++val;          // add 1 to val
    }
    std::cout << "Sum of 1 to 10 inclusive is "
              << sum << std::endl;
    return 0;
}

Answer 1

sum += val;     // assigns sum+ val to sum\

摆脱行尾的反斜杠.那是一个线条延续的角色.它导致下一行连接到此行; 换句话说,++val成为"分配总和+ val求和"评论的一部分.