Question

在使用vs2010编译（并执行）这个c ++代码时，我甚至在它甚至可以向控制台一瞥“Start”之前就得到了堆栈溢出异常。

我使用的所有头文件都包含在stdafx.h中，但这显然不是问题（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

任何帮助都会非常感激，我是c ++的绝对初学者，正如你在代码风格中看到的那样，我尝试了一切以摆脱这个烦人的问题，例如甚至没有声明一个额外的功能和等等...请帮助我，不要犹豫，询问您是否需要其他信息。提前谢谢。

#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;
}

Answer 1

问题是

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

它是一个16 MB +的本地数组，太大而不适合堆栈（通常为1 MB） - 你必须使用new语句在堆中创建它：

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

然后记得在你不再需要时用delete语句取消分配它：

delete[] data;

进入main（）之前的堆栈溢出异常

1 个答案: