#include<iostream> 
#include<string>
using namespace std;
string n[115][115];
string t[101][101];
int geshu(int a,int b){
	int g=0;
	string c;
	c=n[a][b]+n[a+1][b]+n[a+2][b]+n[a+3][b]+n[a+4][b]+n[a+5][b]+n[a+6][b];
	if(c=="yizhong"||c=="gnohziy")
		g++;
	c=n[a][b]+n[a+1][b+1]+n[a+2][b+2]+n[b+3][b+3]+n[a+4][b+4]+n[a+5][b+5]+n[a+6][b+6];
	if(c=="yizhong"||c=="gnohziy")
		g++;
	c=n[a][b]+n[a-1][b+1]+n[a-2][b+2]+n[a-3][b+3]+n[a-4][b+4]+n[a-5][b+5]+n[a-6][b+6];
	if(c=="yizhong"||c=="gnohziy")
		g++;
	c=n[a][b]+n[a][b+1]+n[a][b+2]+n[a][b+3]+n[a][b+4]+n[a][b+5]+n[a][b+6];
	if(c=="yizhong"||c=="gnohziy")
		g++;
	return g;
}
int main(){
	int N,ji=0;
	string k;
	cin>>N;
	for(int i=7;i<=N+7;i++){//输入处理 
		cin>>k;
		for(int j=7;j<=N+7;j++){
			n[i][j]=k.substr(j,1);
		}
	}
	for(int i=7;i<=N+7;i++) 
		for(int j=7;j<=N+7;j++)
			ji+=geshu(i,j);
	cout<<ji;
}

自己用样例得到的结果：

7
aaaaaaa//输入
terminate called after throwing an instance of 'std::out_of_range'
  what():  basic_string::substr: __pos (which is 8) > this->size() (which is 7)

--------------------------------
Process exited after 8.192 seconds with return value 3
请按任意键继续. . .

什么意思？没看懂