问题描述
我正在尝试在循环内创建一个空向量，并且希望在每次将某些内容读入该循环时向该向量添加一个元素.
I am trying to create an empty vector inside a loop, and want to add an element to the vector each time something is read in to that loop.
#include <iostream>
#include <vector>
using namespace std;
int main()
{
std::vector<float> myVector();
float x;
while(cin >> x)
myVector.insert(x);
return 0;
}
但这给了我错误信息.
推荐答案
您需要使用 std::vector::push_back() 代替:
You need to use std::vector::push_back() instead:
while(cin >> x)
myVector.push_back(x);
// ^^^^^^^^^
而不是 std::vector::insert()，正如你在链接中看到的，它需要一个迭代器来指示你想要插入元素的位置.
and not std::vector::insert(), which, as you can see in the link, needs an iterator to indicate the position where you want to insert the element.
另外，作为 @Joel 评论了什么，您应该删除向量变量定义中的括号.
Also, as what @Joel has commented, you should remove the parentheses in your vector variable's definition.
std::vector<float> myVector;
和不是
std::vector<float> myVector();
通过执行后者，您会遇到 C++ 的最烦人的解析问题.
By doing the latter, you run into C++'s Most Vexing Parse problem.
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