C++ 教程目录

友元、异常和其他

newexcp.cpp

来源: 友元、异常和其他

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原始代码预览

// newexcp.cpp -- the bad_alloc exception
#include <iostream>
#include <new>
#include <cstdlib>  // for exit(), EXIT_FAILURE
using namespace std;

struct Big
{
    double stuff[20000];
};

int main()
{
    Big * pb;
    try {
        cout << "Trying to get a big block of memory:\n";
        pb = new Big[10000]; // 1,600,000,000 bytes
        cout << "Got past the new request:\n";
    }
    catch (bad_alloc & ba)
    {
        cout << "Caught the exception!\n";
        cout << ba.what() << endl;
        exit(EXIT_FAILURE);
    }
    cout << "Memory successfully allocated\n";
    pb[0].stuff[0] = 4;
    cout << pb[0].stuff[0] << endl;
    delete [] pb;
    // cin.get();
    return 0; 
}
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