离大谱了简直是。

#include <iostream>
#include <cstdio>
#include <cmath>
#include <algorithm>
#include <string>
#include <string.h>
using namespace std;
struct modxy
{
    int x;
    int y;
};
char a[1000][1000];
int n,m;
modxy head,tail,right,left;
bool flag=false;
int main()
{
    scanf ("%d %d", &n, &m);
    for (int i=1;i<=n;i++)
    {
        for (int j=1;j<=m;j++)
        {
            cin>>a[i][j];
        }
    }
    
    for (int i=1;i<=m;i++)
    {
        for (int j=1;j<=n;j++)
        {
            if (flag==false&&a[i][j]=='*')
            {
                left.x = i;
                
            }
        }
    }
}

left.x = i;报错：

error: reference to 'left' is ambiguous
   34 |                 left.x = i;