求教:关于using namespace std与自定义类冲突的问题//use the class#includeiostream#includecstring
求教:关于using namespace std;与自定义类冲突的问题
//use the class #include<iostream> #include<cstring> #include"string.h"
const int arsize=10; const int maxlen=81; int main() { using namespace std; string name;//string是自定义的类,但是编译的时候报错说string不明确 cout<<"Hi,what's your name?\n"; cin>>name; cout<<name<<", please enter up to "<<arsize <<"short sayings <empty line to quit>:\n"; string saying[arsize]; char temp[maxlen]; int i; for (i=0;i<arsize;i++) { cout<<i+1<<": "; cin.get(temp,maxlen); while(cin&&cin.get()!='\n') continue; if(!cin||temp[0]=='\0') break; else saying[i]=temp; } int total=i; if (total>0) { cout<<"Here are your sayings:\n"; for (i=0;i<total;i++) cout<<saying[i][0]<<": "<<saying[i]<<endl; int shortest=0; int first=0; for (i=i;i<total;i++) { if(saying[i].length()<saying[shortest].length()) shortest=i; if(saying[i]<saying[first]) first=i; } cout<<"shortest saying:\n"<<saying[shortest]<<endl; cout<<"first alphabetically:\n"<<saying[first]<<endl; cout<<"this program used "<<string::howmany()<<" string objects.Bye.\n"; } else cout<<"no input!Bye.\n"; return 0;
}
string是自定义的类,但是编译的时候报错说string不明确,如果改成
using std::cout; using std::cin; using std::endl; string name;