加上了还是有错
[CODE]#include <cstdlib>
#include <iostream>
#include <string>
#include <vector>
using namespace std;
int main(int argc, char *argv[])
{

struct Pair{
string name;
double val;
};

vector<Pair>Pairs;

system("PAUSE");
return EXIT_SUCCESS;
}[/CODE]

#include <cstdlib>
#include <iostream>
#include <string>
#include <vector>

using namespace std;
struct Pair{
string name;
double val;
};
int main(int argc, char *argv[])
{



vector<Pair>Pairs;

system("PAUSE");
return EXIT_SUCCESS;
}

[/CODE]
这样写可以
但这样写不可以.为什么?
[CODE]#include <cstdlib>
#include <iostream>
#include <string>
#include <vector>
using namespace std;
int main(int argc, char *argv[])
{



vector<Pair>Pairs;

system("PAUSE");
return EXIT_SUCCESS;
}

struct Pair{
string name;
double val;
};[/CODE]