string流

#include<iostream>
#include<sstream>
using namespace std;
void main(){
freopen("testdata.txt","rt",stdin);
for(string s;getline(cin,s); ){
   int a,sum=0;
   for(istringstream a1(s);a1>>a;sum+=a);
   cout<<sum<<endl;

}



}

转载于:https://www.cnblogs.com/hqu-ye/archive/2013/02/23/2923462.html