B2135 单词替换 (变式)

#include<bits/stdc++.h>
using namespace std;
char s[210],a[110],b[110];
int la,lb,ls,nowtop,nowend=-1,nowoutput=1;
int main()
{
    while(1)
    {
        char now_input;
        scanf("%c",&now_input);
        if(now_input=='\n')
            break;
        s[++ls]=now_input;
    }
    while(1)
    {
        char now_input;
        scanf("%c",&now_input);
        if(now_input=='\n')
            break;
        a[++la]=now_input;
    }
    /*while(1)
    {
        char now_input;
        scanf("%c",&now_input);
        if(now_input=='\n')
            break;
        b[++lb]=now_input;
    }*/
    while(scanf("%c",&b[++lb])!=EOF)
    {
    }
    lb--;
    //cout<<ls<<" "<<la<<" "<<lb<<endl;
    for(int i=1;i<=ls;i++)
    {
        if(a[1]==s[i]&&nowend!=i-1)
        {           
            nowtop=i;
        }
        nowend=i;
        if(a[i-nowtop+1]==s[i])
        {
            if(nowend-nowtop+1==la)
            {
               for(int j=1;j<=lb;j++)
                {
                   cout<<b[j];
                }
                nowend=i+1;
                nowtop=0;
                nowoutput=i+1;
            }
            continue;
        }
        else
            nowtop=i+1;
        if(nowoutput==0)
            nowoutput++;
        for(int j=nowoutput;j<=nowend;j++)
        {
            cout<<s[j];
        }
        //cout<<nowoutput<<" "<<nowend<<" ";
        nowoutput=nowend+1;
        //cout<<nowoutput<<endl;
    }
}