5

当使用 vs2010 编译（和执行）这个 c++ 代码时，我得到一个堆栈溢出异常，就在它甚至可以向控制台写入“开始”的一瞥之前。

我使用的所有头文件都包含在 stdafx.h 中，但这显然不是这里的问题（直接包含头文件时同样的问题）。

堆栈跟踪如下：

>   msvcr100d.dll!__set_flsgetvalue()  Zeile 145 + 0xc Bytes    C
    msvcr100d.dll!_getptd_noexit()  Zeile 500   C
    msvcr100d.dll!_getptd()  Zeile 523 + 0x5 Bytes  C
    msvcr100d.dll!_LocaleUpdate::_LocaleUpdate(localeinfo_struct * plocinfo)  Zeile 243 + 0x5 Bytes C++
    003efe3c()  
    TerrainGenerator.exe!pre_cpp_init()  Zeile 298 + 0x21 Bytes C

任何帮助将不胜感激，我是 C++ 的绝对初学者，正如您在代码样式中看到的那样，我尽一切努力摆脱这个烦人的问题，例如甚至没有声明一个附加函数等等。 ..请帮助我，不要犹豫，询问您是否需要更多信息。提前致谢。

#include "stdafx.h"

int main(int argc, char* argv[])
{
    puts("Start");

    const int res = 4096;
    srand(time(NULL));

    uint16_t data[(res+1)*(res+1)];

    uint16_t variance = 2000;
    int seed = 1337;

    data[0] = ((seed>>1)+(int)(rand()/(RAND_MAX*(seed+(seed>>1)))));
    data[res] = ((seed>>1)+(int)(rand()/(RAND_MAX*(seed+(seed>>1)))));
    data[res*res] = ((seed>>1)+(int)(rand()/(RAND_MAX*(seed+(seed>>1)))));
    data[res*(res+1)] = ((seed>>1)+(int)(rand()/(RAND_MAX*(seed+(seed>>1)))));

    int count = 0;
    for(int size=res;size>=1;size=size>>1,variance=variance>>1)
    {
        count++;
        for(int x=size;x<res;x+=size<<1) 
        {
            for(int y=size;y<res;y+=size<<1) 
            {
                data[x*res+y] = data[(x-size)*res+(y-size)] + data[(x-size)*res+(y+size)] + data[(x+size)*res+(y-size)] + data[(x+size)*res+(y+size)];
                data[x*res+y] /= 4;
                data[x*res+y] += (variance>data[x*res+y])?(-(data[x*res+y]^2/variance)+(int)(rand()/(RAND_MAX*(data[x*res+y]^2/variance)))):(-variance+(int)(rand()/(RAND_MAX*variance*2)));
            }
        }

        for(int x=0;x<res;x+=size)
        {
            for(int y=0;y<res;y+=size)
            {
                if(x!=res-1)
                {
                    data[(x+(size>>1))*res+y] = data[x*res+y] + data[(x+size)*res+y] + ((y!=res-1)?data[(x+(size>>1))*res+(y+(size>>1))]:0) + ((y!=0)?data[(x+(size>>1))*res+(y-(size>>1))]:0);
                    data[(x+(size>>1))*res+y] /= (y!=res-1&&y!=0)?4:3;
                    data[(x+(size>>1))*res+y] += (variance>data[(x+(size>>1))*res+y])?((-(data[(x+(size>>1))*res+y]^2/variance)+(int)(rand()/(RAND_MAX*(data[(x+(size>>1))*res+y]^2/variance))))):(-variance+(int)(rand()/(RAND_MAX*variance*2)));
                }
                if(y!=res-1)
                {
                    data[x*res+(y+(size>>1))] = data[x*res+y] + data[x*res+(y+size)] + ((x!=res-1)?data[(x+(size>>1))*res+(y+(size>>1))]:0) + ((x!=0)?data[(x-(size>>1))*res+(y+(size>>1))]:0);
                    data[x*res+(y+(size>>1))] /= (x!=res-1&&x!=0)?4:3;
                    data[x*res+(y+(size>>1))] += (variance>data[x*res+(y+(size>>1))])?((-(data[x*res+(y+(size>>1))]^2/variance)+(int)(rand()/(RAND_MAX*(data[x*res+(y+(size>>1))]^2/variance))))):(-variance+(int)(rand()/(RAND_MAX*variance*2)));
                }
            }
        }
    }

    size_t Count = res*res;
    uint16_t* Block = data;
    char* Path = "export.raw";

    if(!Block) return false;
    FILE * filePointer = NULL;
    errno_t error = fopen_s(&filePointer, Path, "wb");
    if(error) return false;
    fwrite(Block, sizeof(uint16_t), Count, filePointer);
    fclose(filePointer);
    return true;

    return 0;
}
4

1 回答 1

12

问题是

uint16_t data[(res+1)*(res+1)];

它是一个 16 MB+ 的本地数组，太大而无法放入堆栈（通常为 1 MB） - 您必须使用以下new语句在堆中创建它：

uint16_t* data = new uint16_t[(res+1)*(res+1)];

然后记住在delete不再需要它时使用语句取消分配它：

delete[] data;
于 2012-04-28T18:59:39.653 回答