我从C++ Primer复制了这段代码作为while循环的示例,但它没有输出任何内容。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;
}