C++小白求教0.0

出现错误 Run-time.check Failure #2-stack around the variable 'link_id' was corrupted.
程序如下：
#include "stdafx.h"
#include<iostream>

using namespace std;


int main()
{
    int a=0,b=0,c=0,d=0,e=0,i,j;
    char s[3][10];   
    for(i=0;i<=2;i++)
    {
        cout<<"请输入第"<<i+1<<"行字"<<endl;
        gets(s[i]);
        for(j=0;j<10&&s[i][j]!='\0';j++)
        {
            if(s[i][j]>=65&&s[i][j]<=90) a++;
            else if(s[i][j]>=97&&s[i][j]<=122) b++;
            else if(s[i][j]>=48&&s[i][j]<=57) c++;
            else if(s[i][j]==32) d++;
            else e++;
        }
     }
    cout<<"共有大写字母"<<a<<"个，小写字母"<<b<<"个，数字"<<c<<"个，空格"<<d<<"个，其他字符"<<e<<"个。"<<endl;
    return 0;
}

为什么调试最后会出现 Run-time.check Failure #2-stack around the variable 'link_id' was corrupted.这样的错误呢……