为各位大佬献上代码：

#include"iostream"//cin,cout
#include"stdio.h"//printf()
#include"string"//string,size()
using namespace std;//cin,cout,string,size()
int main(void){
    string mains/*给定的文章包含的单词*/,subs/*特定的单词*/;
    int fpos=-1,times=0;
    cin>>subs;
    getline(cin,mains);
    for(int i=0;i<mains.size();i++)
        if(mains[i]>='A'&&mains[i]<='Z')
            mains[i]+=32;
    while(mains.find(subs)!=-1||mains.find(subs)-1!=' '||mains.find(subs)+subs.size()!=' ')
        if(mains.find(subs)!=-1||mains.find(subs)-1!=' '||mains.find(subs)+subs.size()!=' '){
            if(fpos==-1)
                fpos=mains.find(subs);
            mains.replace(mains.find(subs),subs.size(),"");
            times++;
        }
    if(times)
        printf("%d ",times);
    printf("%d",fpos);
    return 0;
}

顺便教教我这只蒟蒻RE的查错方法呗。。。