关于位域的问题，求助！
#include "iostream.h"

struct Test
{
int a:2;
int b:2;
int c:1;
}test;

int main(int argc, char* argv[])
{
test.a = 1;
test.b = 3;
test.c = 1;
cout<<test.a<<endl;
cout<<test.b<<endl;
cout<<test.c<<endl;
return 0；
}


在VC6.0下结果是1，-1，-1，求解释！！

[解决办法]
你定义的是有符号数，当然结果是这样，比如3 = (11)b，符号位为1，所以结果是-1，这样改即可：

C/C++ code

#include <iostream>using namespace std;struct Test {    unsigned int a : 2;    unsigned int b : 2;    unsigned int c : 1;}test;int main(int argc, char* argv[]){    test.a = 1;    test.b = 3;    test.c = 1;    cout << test.a << endl;    cout << test.b << endl;    cout << test.c << endl;      return 0;}