Question

C++vector< <pair<string,int> >数据怎么读取？

pair<string,int> psi;
vector< pair<string,int> > str_int;
string str;
int integer;
cout << "please enter charater and integer(ctrl+z to end:)" << endl;
while( cin >> str >> integer ){
psi = make_pair(str,integer);
str_int.push_back(psi);
}
vector< pair<string,int> >::iterator read;
read = str_int.begin();
while( read != str_int.end() ){
cout << *read.first++ << endl;//我想在这里读取vector里的pair类型数据，可编译错误！请问我该怎么样读取？
}
return 0;

Answer 1

代码如下，亲测可用：

pair<string,int> psi; vector< pair<string,int> > str_int; string str; int integer; cout << "please enter charater and integer(ctrl+z to end:)" << endl; while( cin >> str >> integer ){ psi = make_pair(str,integer); str_int.push_back(psi); } vector< pair<string,int> >::iterator read; read = str_int.begin(); 
while( read != str_int.end() )
{
  cout << (*read).first << endl;
  read++;
}} return 0;

Answer 2

while( read != str_int.end() ){
cout << *read.first++ << endl;//我想在这里读取vector里的pair类型数据，可编译错误！请问我

改成:
while( read != str_int.end() )
{
cout << (*read).first << endl;
read++;
}