Gcc problems under HP system

Gcc problems under HP system

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I compiled this program under HP 11.00 9000/785 system ,with gcc 3.0.There's neither error nor warning during the compile process.But when I ran it,Segmentation fault happened and the program terminated.
 
Here is the program:
#include <stdio.h>
#include <string>
using namespace std;
 
class mapnode     
{
 string srcName,desName;
};
 
int main()
{
 fprintf(stderr,"Before mapnode constructor\n");
 mapnode a[2000];
 fprintf(stderr,"Mapnode constructor accomplished\n");
 return 1;
}
 
And my compile option: g++ main.cpp
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