string而非cstring
c++的类库太强大了！给力！#include<iostream>#include<cstdio>#include<string>#include<set>using namespace std;string cla="class",be="begin",end="end",sub="Sub",def="def",call="call",undef="undef";string ch,t1,t2;set<string> duck;set<string>::iterator it;//迭代器int main(){int t;int i,j,len,k;cin>>t;while(t--){cin>>ch;while(ch.compare (end)!=0)//比较函数{if(ch==be) {};if(ch==cla){cin>>t1;if(t1.at(3)==':'){len=t1.size ();t2=t1.substr (4,len-1);//复制it=duck.find(t2);if(it==duck.end ()){printf("oops!\n");}else{/*printf("%s %s\n",ch.c_str() ,t1.c_str ());*/string 用printf输出if(duck.count (t1)!=0)printf("oops!\n");else {cout<<ch<<" "<<t1<<endl;duck.insert (t1);}}}else {if(duck.count (t1)==0){cout<<ch<<" "<<t1<<endl;duck.insert (t1);}elseprintf("oops!\n");}}if(ch==def){cin>>t1;int point=t1.find ('.');t2=t1.substr (0,point-1);if(duck.find (t2)==duck.end ())printf("oops!\n");else {if(duck.find (t1)==duck.end ()){cout<<"def"<<" "<<t1<<endl;duck.insert (t1);}}}if(ch==call){cin>>t1;}cin>>ch;}}return 0;}
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