POJ 1028

模拟网页，大水。

<pre name="code" class="cpp">#include<iostream>#include<cstdio>#include<cstring>using namespace std;#define max 105char arr[max][max];void initarr(){    for(int i=0; i<max; i++)        //memset(arr[i],"\0",max);        strcpy(arr[i],"\0");}int main(){    int i,j,k,m,n,t;    char input[max]="\0";    int top=-1;    int base=-1;    initarr();    strcpy(arr[0],"http://www.acm.org/");    base++;    top++;    while(gets(input))    {        if(!strcmp(input,"QUIT"))        {            return 0;        }        char order[max]="\0";        // memccpy(order,input,' ',strlen(input));        for(i=0; i<strlen(input); i++)        {            if(input[i]!=' ')                order[i]=input[i];            else                break;        }        if(!strcmp(order,"BACK"))        {            if(top<=0)                cout<<"Ignored"<<endl;            else            {                top--;                cout<<arr[top]<<endl;            }        }        else if(!strcmp(order,"FORWARD"))        {            if(top>=base)                cout<<"Ignored"<<endl;            else            {                top++;                //base++;                cout<<arr[top]<<endl;            }        }        else        {            char url[max]="\0";            for(i=strlen(order)+1; i<strlen(input); i++)                url[strlen(url)]=input[i];            top++;            strcpy(arr[top],url);            for(i=top+1; i<base; i++)            {                strcpy(arr[i],"\0");            }            base=top;            cout<<arr[top]<<endl;        }    }    return 0;}