istringstream对象可以绑定一行字符串，然后以空格为分隔符把改行分隔开来

#include <sstream>#include <iostream>#include <fstream>#include <string>using namespace std;void TestIstringStream(void){string word, line;getline(cin, line);istringstream isstream(line);while (isstream >> word){cout<< word.c_str() << endl;}}

输入：

 ag              dfd             kk

输出：

ag

dfd

kk