我这样改了，在VC6.0下调试没有问题：

#include <iostream>
#include <algorithm>

using namespace std;
int main(int argc, char* argv[])
{
    int setA[5] = {2,4,5,7,8};
    int setB[7] = {1,2 ,3,4,5,6,7};
    int setC[5] = {2,5,8,8,15};
    int setD[6] = { 1,4,4,6,7,12};
    int AunionB[10];
    int AunionC[10];
    int BunionD[15];
    int AintersectB[10];
    int AintersectC[10];
    
    int *lastElem;
    
    ostream_iterator<int> display(cout," ");
    int AdifferenceB[10];
    
    lastElem = set_difference(setA,setA+5,setB,setB+7,AdifferenceB);
    
    cout<<"Line 74: AdifferenceB: ";
    copy(AdifferenceB,lastElem,display);
    cout<<endl;
    
    int BsymDiffC[5];
    lastElem = set_symmetric_difference(setB,setB+7,setC,setC+5,BsymDiffC);
    cout<<"Line 80: BsymDiffC: ";
    copy(BsymDiffC,lastElem,display);
    cout<<endl;
    return 0;
}

你上面的代码是用的UNICODE编译的吧

int BsymDiffC[5];
缓冲区太小了, 堆栈中的返回地址被覆盖了

楼主HUST的?