Problem overview

Today, when learning the vector container, I found that clion threw such an error, as shown in the following figure

this problem still exists after compiling with clang

~/Documents/Clion_Project/Learning/L11.cpp:12:1: error: expected unqualified-id
for (int i = 0; i < v.size(); i++)
^
1 error generated.

reason:

The main function is not written

Solution:

#include <vector>
using namespace std;

int main()
{
    struct Vertex
    {
        int a;
        float b;
    };

    vector<Vertex> v;
    for (int i = 0; i < v.size(); i++)
    {

    }
}